It is difficult to graduate with a doctorate in engineering materials. The doctoral research of engineering materials science in Harbin needs to deeply understand the nature, structure and behavior of materials, and conduct complex experiments and analysis. This involves a lot of professional knowledge and technology, and requires a lot of experimental methods and instrument operation skills. The research of engineering materials science in Harbin needs certain laboratory conditions and equipment support, such as high-precision testing instruments and advanced material preparation equipment. Doctoral research on engineering materials generally takes more than three years, or even longer. In this process, doctoral students need to complete the design of scientific research projects, the collection and analysis of experimental data, the writing of literature review and the writing of papers. Therefore, it is difficult for Harbin to graduate with a doctorate in engineering materials.