The technical efficiency of grain production is the direct reflection of its production level.Identifying the growth path of grain production’s technical efficiency is the key to the production growth.Based on the panel date of China’s 30 main production provinces (cities and districts),this paper uses extended Solow Mode to construct Spatial Durbin Model to calculate the direct impact and spillover effect of all factors on the base of calculating the grain production technical efficiency of all areas.The result shows that spillover effect is the main reason for the improvement of China’s grain production technical efficiency.To be specific,urbanization level has significant positive impact and spillover effect on the technical efficiency improvement; agricultural disasters have significant negative direct impact on that; farmer’s education level and per capita arable land scale have significant negative spillover effect on that.Therefore,this paepr proposes several suggestions,such as keeping appropriate grain production scale,cultivating professional farmers,building grain function main production areas,strengthening financial and social services support to the grain production so as to improve the technical efficiency of grain production.