Abstract: In order to study the farmers’ corn planting behavior characteristics and determinants of the will of farmers planting more corn in hilly areas, with the method of field investigation, the authors researched 269 farmers’ corn planting behavior in the hilly areas in Shanxi Province, and adopted the Logit model of selection model to study the influencing factors of the will of farmers planting more corn. The results showed that: land area, farmers corn planting pattern and the sale price of corn were positively correlated to farmers’ intention of expand planting area; the cost of labor, capital investment and planting purpose were negatively related to the expanding of planting area. To increase corn planting area and improve corn production, related departments should continue to promote the land circulation, strengthen the development and popularization of the mechanical technology and corn planting technology, keep stable and low price of agricultural materials, reduce the cost of corn production, and at the same time, improve the protective price system of corn and protect the enthusiasm of farmers in corn planting.