The thesis summar ized achievements since agricultural development in main grain producing area comprehensively, and analyzed contradiction and problems facing agricultural development, meanwhile,stated the train of thought of agricultural development in main grain producing area at the beginning of 21st century, and the ways and measures to deal with it.

As agricultural specailization region, Main grain producing area is at very important status in economy development.

Based on the modified Molow model, the paper has studied the historical actuality about farmer s income growth in main grain-growing area with China s agricultural economy policies since new China, and concludes that making together with implementing economy policy in agriculture has direct correlativity to farmer income growth .

Our main grain-growing areas face many problems in improving the synthetic production of grain and protect the safety of our grain.

The important effect of main grain product area in China on grain product has been studied in the thesis.

To take Siping as an example, which is the main grain produce region, The paper analyzes how to turn the superiority of resources into the superiority of industry truly to increase the appended value and efficiency of the agricultural produce, and the peasant income in the main grain product area .

Income of farm household in major grain producing areas is positively correlated with educational level of farm workers,unit grain yield,seeded area of quality grain varieties,and the investment capacity of farm households,and negatively correlated with work time of farm households.

The major grain producing areas have a very important contribution to protect ing food safety of China.