Grain industry is a mainstay industry of Jilin Province, and an important part of economic develop-ment of Jilin Province. Taking Jilin Province as the research object, variant causes and influencing factors of overallgrain production capacity of Jilin Province were analyzed in the paper from corn planting area, total production and yield, etc. Suggestions for ensuring overall grain production capacity in Jilin Province were put forward, which attempts to provide reference for realizing agricultural modernization in Jilin Province.