In 2020，China put forward the strategic arrangement on construction of national grain security industrial belt. The three northeastern provinces pay attention to this work greatly. During the period of 13th Five-Year plan，the three northeastern provinces strictly prevent cultivated land being used into non-agricultural and non-grain conversion，pay attention to the work on the protection and utilization of black land greatly，improves the level of agricultural modernization and the green level of the grain industry constantly，speeds up the development of the grain processing industry，constantly strengthens the grain reserve capacity，and get remarkable results in the structural reform of the grain supply side，which has become the core area of the construction of the national grain security industrial belt. However，there are also some problems in the construction of the grain security industrial belt in the three provinces of northeast China，such as the problems of scientific research of soybean and corn seed industry，the ability of preventing and resisting disaster is not strong，and farmers’ grain reserves are not good. Therefore，this paper puts forward some suggestions on the development power of grain industry in the three provinces of northeast of China should be transformed from factor-driven to benefit-driven and innovation-driven；ensure the quality of high-standard farmland construction，bring into play the role of high-standard farmland；attach great importance to the scientific and technological research of soybean and maize and substitute breeding；pay attention to the cultivation and development of green functional grain industry；improving the comprehensive utilization level of grain processing by-products，and so on.