Graduation design is a summative practical teaching link adopted in the last stage of the teaching process. Through the graduation project, students can comprehensively apply all kinds of theoretical knowledge and skills they have learned, and carry out comprehensive, systematic and strict technical and basic ability exercises. Usually, only junior college or college students are required to carry out graduation design according to different majors before graduation, and secondary school students are not required. According to the strategic policy of education reform and development put forward by Comrade Deng Xiaoping, "Education should face modernization, the world and the future", on the basis of requiring students to master the corresponding theoretical knowledge and professional skills of secondary specialized schools, our school actively creates conditions to "move up" secondary vocational and technical education and try out the graduation design of secondary specialized schools, so as to meet the requirements of new technological revolution, modern society and modern production for high-quality workers, and achieved good results. I. Necessity and possibility of implementing graduation project 1. Graduation design strengthens the purpose of secondary vocational and technical education. Vocational and technical education is mainly to train junior and intermediate technicians, managers and other secondary professionals with certain cultural basic knowledge, professional theoretical knowledge and operational skills for urban and rural economic construction and reach the secondary education level. Vocational and technical education must serve local economic construction and shoulder the heavy responsibility of cultivating high-quality workers. The rapid development of science and technology has brought about the fourth scientific and technological revolution. The speed of knowledge updating is accelerated, the cycle is shortened, and the combination of science and technology and economy is closer. With the change of industrial structure, jobs that require physical strength and simple skills will gradually decrease, while jobs that require higher knowledge and intelligence will increase. Take the mechanical specialty as an example: some precision machining that used to be completed by middle and senior lathe workers can be easily completed and done better now as long as the workers who master CNC machining technology use CNC lathes. Due to the continuous application of new technology and equipment, the requirements for post ability are getting higher and higher, especially for employees to actively adapt and creatively carry out their work. Therefore, vocational and technical education can no longer be satisfied with training skilled workers, but should train more creative skilled workers. As an innovative education, graduation project can teach students a method and a brand-new way of thinking, and can stimulate students' innovative consciousness and potential. The content of graduation project can be the synthesis of multi-subjects, disciplines and skills, skills and production. Infiltrating various contents into a subject will help students form a more comprehensive and complete cognitive structure and form a good atmosphere to encourage and advocate innovation. 2. This graduation project implements the principle of integrating theory with practice. Vocational and technical education should be based on reality and focus on the future, actively create conditions, and combine vocational theory education with modern production practice. The combination of theory and practice not only includes the combination of relevant knowledge and skill practice in the classroom, but also includes guiding students to understand and contact with social reality. Students' graduation project is to solve some practical problems through various ways under the guidance of professional theoretical knowledge. In the design process, students can apply their theoretical knowledge to practice, which can not only deepen their understanding of professional theoretical knowledge, but also enrich and develop theoretical knowledge in books and transform it into higher-level experience, skills and skills. Because the current teaching mode, theoretical knowledge and skills, especially production practice, are seriously out of touch, students can't connect the theoretical knowledge in class with the actual production problems, which leads to useless learning. Increasing graduation design and guiding students to consciously and systematically use the knowledge and skills they have learned for analysis and thinking are conducive to the organic combination of theoretical knowledge and practice. 3. Graduation design helps to improve students' ability to adapt to future work. Due to the change of social life and the influence of scientific and technological progress on society and individuals, the rational illusion that schools can meet all the educational needs of life has been shattered. The development of society requires workers to constantly update their knowledge, and everyone's career can't remain unchanged for life. All these require students not only to master certain theoretical knowledge and skills, but also to cultivate the ability of further learning. The reform and development of education should not only reflect the actual needs of contemporary society, but also fully consider the development trend of society. School education should provide corresponding knowledge, ability and quality foundation for students' lifelong development, and students' development is above all else. Therefore, we should update the concept of vocational education and adjust the depth of vocational education, focusing not only on today and tomorrow, but also on the future of students. Curriculum design can strengthen the connection of various courses, expand the skills of some similar or related professional knowledge, leave students with the knowledge "interface" needed to adapt to various jobs, and lay the knowledge foundation and ability foundation for students' lifelong education. 4. Feasibility of graduation project. Through a certain period of on-campus study, students have obtained corresponding theoretical knowledge and certain professional skills; The production practice of the factory has made it gain some practical experience. For them, they should be better able to understand the application of theoretical knowledge in production practice. Some practical problems involved in production practice can be used to promote their active exploration. It should be said that the graduation project has a good foundation from the preparation of knowledge and skills to the full familiarity of psychology. Second, the steps of graduation design 1. Determine the topic of graduation project. Topic selection is the key to graduation design. A good project can strengthen theoretical knowledge and practical skills, so that students can give full play to their creativity and successfully complete their graduation project. The topic of graduation project can be comprehensively considered from the following aspects: (1) It is beneficial to synthesize what students have learned. (2) can combine the characteristics of the subject. (3) Try to be practical. (4) It has certain application value. According to the above requirements, we can consider excavating disciplines from the following angles: (1) Extension of discipline teaching. For example, combined with electrical control circuit, students are required to design the control circuit of mechanical power head and install and debug it. Design and assembly of logic circuit combined with digital circuit. (2) Multidisciplinary synthesis. Determine a comprehensive discipline by combining professional disciplines. If the theme is large, it can be broken down into several sub-themes, handed over to different groups to complete, and finally integrated into a complete theme. For example, mechanical and electrical majors can design the following topics: traffic lights in big cities. This topic can be divided into the following two sub-topics: signal lamp display controlled by PLC and clock circuit for timing signal length. (3) Combining with production practice. Schools can cooperate with some units to develop a number of practical projects suitable for students' design, and even take a production task of some units as a design project. Schools should pay attention to the accumulation of subject materials, try to choose the subject that is most suitable for teaching content and closest to production practice, complete the construction of database, and create a good foundation for the continuous improvement of disciplines in the future. 2. Guide students to design. After assigning tasks to students, instructors should guide students to analyze topics, determine design ideas, make full use of technical materials, pay attention to design methods, and use reference books reasonably. Students should pay attention to the gap between theory and practice when designing, and fully consider the feasibility of design. Instructors should pay attention to the quality and speed of students completing tasks, point out their shortcomings in time and inspire them to think independently. In the design process, students should be guided to develop good safety awareness and rigorous work style. After the design is completed, you should write a graduation design thesis and make a comprehensive summary of your own design process. 3. Organize the answer. Answering questions is an "oral test" to check the quality of students' graduation design. Through this form, it helps students to further summarize the design process, improve their adaptability and self-confidence, and lay a solid foundation for truly stepping into society. The defense mainly examines some professional basic knowledge and basic theory of students. The process of defense is actually the process of helping students summarize. Teachers should actively guide students to sum up the experience accumulated in the design process, analyze the design effect, find out the shortcomings and improvement methods, and help students turn practice into their own knowledge and skills. Through the defense, it will also help students improve their adaptability and self-confidence and lay a solid foundation for truly entering the society. 4. Evaluation results. The results of graduation design should truly reflect the actual level of students' knowledge, skills and skills. Instructors should have a deep and practical understanding of each student and evaluate the complexity and technical requirements of the design task. Teachers should comprehensively measure students' achievements from the aspects of design ideas, ability to analyze and solve problems, design quality and safe and civilized production. Iii. Key points of graduation design 1. Pay attention to the practicality and teaching of the topic. The ultimate goal of learning is application. Courses combined with practice can stimulate students' learning motivation and generate strong interest in learning. In the actual teaching process, we find that the enthusiasm of students who get practical problems is obviously higher than that of other students. So the topic should be as close as possible to the actual production and life. Paying attention to the teaching performance of the topic makes the knowledge connect the preceding with the following. On the one hand, it strengthens the original knowledge, on the other hand, it ensures the consistency of knowledge, which helps students to further digest the original knowledge and improve themselves. We should consider the differences of students' practical abilities. Students inevitably have great differences in theoretical basis and practical ability. Therefore, the preparation of the topic should be hierarchical. Otherwise, too simple projects will make some students with strong ability have a contemptuous attitude, get things done hastily, or finish the design too early, which will affect other students; However, some students with poor foundation are afraid of the difficulty of the project, and finally they have to be taught by the teacher or even arranged by the teacher, which makes the graduation project a mere formality and does not play its due role. Therefore, when grouping, it is necessary to make reasonable arrangements. When arranging topics, the design topics of students with good foundation and students with poor foundation should be different, which should conform to each student's actual ability as much as possible, so that each student has a strong desire to explore and an urgent psychological requirement to solve problems. 3. Instructors should have strong theoretical knowledge and rich practical experience. Graduation design involves both theoretical knowledge and practical skills. Therefore, the instructor should be able to give theoretical guidance and practical help. Schools should be equipped with enough instructors to meet the needs of design. Schools can also consider hiring experienced technicians to participate in this process to improve the design quality.