There are many factors that affect the area of grain cultivation, and the relationship between them is complex and there may be a variety of food and regional differences. In this paper, the main reference index system and the data released by the official website, collected from 2006-2014 data analysis, Person correlation coefficients by dimensionless index data, selected the grain planting area of 8 evaluation index system, analyzed the grain acreage response model and then establish the minimum purchase price the food and the empirical model to test its reliability, it has important significance in the research of how to increase the grain planting area and ensuring the safety of crop production.