Through drawing lessons from relevant achievements of western credit theory of agricultural products circulation firm expansion in China,and research results two basic model of expansion and utilization have been vertical expansion,transverse expansion,Then the author makes empirical study on the expansion behavior problem of Chinese agricultural products circulation.

Chinese agricultural logistics enterpriese take on the looks of high transaction cost and excessive competition,which means an institution unbalance of agricultural logistics enterprise.

Analyzing the current situation and significance of developing agricultural logistics enterprise s brand,the paper puts forward some measures including how to build up brand sense,brand orientation,brand symbol,brand promotion and brand protection for agricultural logistics enterprise to develop their own brand.

At present, there are two main problems in the circulation of agricultural products, one is the information is blocked and the other is the marketing network is imperfect.

How to accelerate the circulation of agricultural products and promote traditional agriculture transform into modern agriculture,for improving the market of agricultural products, increasing the income of the farmer,pushing forward the readjustment of the agriculture industrial structure and accelerating modernization process of agriculture,is the problem of common concern.