Abstract: Since the beginning of 2 1 century, countries all over the world have produced about10.50 billion cars. According to experts' estimation, the global automobile production will reach 75 million in 20 10. While lamenting the rapid development of automobile industry, people are more and more aware of the harm that automobile pollution brings to human beings, so many countries have formulated environmental protection measures and regulations on automobiles to protect the environment on which human beings depend, so the new concept of automobile environmental protection design has been placed in a prominent and important position. Keywords: development trend of green concept car 1. The concept car is developing towards environmental protection, improving energy utilization and engine configuration, including electronic fuel injection system, secondary air injection, thermal reactor, exhaust gas recirculation system, catalytic purification device, crankcase ventilation system and fuel evaporation control system. Develop alternative fuels and study new environmental protection energy sources, including natural gas, liquefied petroleum gas, fast-charging batteries, hybrid power and hydrogen fuel. Use green materials, green packaging, green manufacturing technology and green equipment and equipment in the automobile manufacturing process. Recycling and remanufacturing of green cars. Second, the concept car indicates the development trend of road traffic mode in the future. With the development of automobile, the status of automobile is changing slowly. Nowadays, cars have become a symbol, a symbol of wealth and a manifestation of status in people's minds. However, the essence of automobile as a road traffic mode is ignored by people. Concept car design is a forward-looking innovative design based on the essence of the car. In the design of the concept car, through the prediction and analysis of human's daily life style, human's use mode, behavior mode and life style in road traffic, it is envisaged to solve the disharmonious factors between people and things in the future road traffic mode. Nowadays, with the strong and rapid development of science and technology, vehicles have a very broad development space, and more and more high-tech technologies are constantly applied to new cars. At present, many big automobile companies in the world have realized that the biggest obstacle to the future automobile development is no longer the limitation of technology, but the limitation of designers' thinking. At present, there are generally two kinds of concept cars at major auto shows: one is the concept car that can be realized with the latest technology, and the other is the concept car that has put forward some innovations but is still in the research stage of technical solutions. For example, cars that can express feelings, cars that can change their shells at will, cars that can easily change their driving style, aquada that can swim in the water, space cars that can fly, and cars that can change color. Like the "POD" car jointly developed by Toyota and Sony, you can express your "feelings" to the owner through headlights, rearview mirrors, tail antennas and seats. For example, the multifunctional concept car "Sal?" Seat, a subsidiary of Volkswagen, was launched at the American International Auto Show? Sa ",there are three driving modes for you to choose from: sports, comfort and city. Third, the concept car shows the cultural differences between countries. As the leader of the world automobile industry, the United States leads the world in the manufacture of concept cars. Because of the blending and collision of various cultures in the United States, its concept car more embodies the diversity of culture; It is also a highly developed commercial country, where commercial design and pragmatism prevail, so its design is based on profound aesthetic ethics and truly solves practical problems. In sharp contrast to American cars, the Japanese concept car. As the second largest automobile country in the world, Japan's concept car is more pragmatic and imaginative, technology is better than art, and it pays more attention to solving technical problems. It can be said that this is the design premise of Japanese concept cars, and the development of each model is to solve a technical problem. However, keeping Japanese cars compact, concise and economical, as well as harmonious man-machine relationship, all reflect the delicacy of Japanese thinking as orientals and their compromise solution to problems. The United States regards design as an important part of commercial action, Japan regards design as a tool to accelerate the elimination of products, Germany regards design as the foundation of social culture, and France regards design as a stage for designers to perform. Therefore, from the different design styles of concept cars in different countries, we can see that different countries have different design concepts and different design cultural backgrounds. Four. Conclusion The future development of automobile design will inevitably change with the progress of automobile technology, and the artistic styles of many designers will be more widely and strongly reflected in automobile design, giving people a wider range of choices. Under the high-tech, the car with distinctive personality and more humanization will be the inevitable development of the automobile industry in the 2 1 century, because it conforms to the pursuit and demand of human culture and personality. Therefore, increasing attention and investment in concept car design will greatly promote the development of China automobile industry.