This paper first constructs a theoretical model of trust,relationship commitment,information sharing and alliance performance,then uses structural equation model to empirically study the relationship among trust,relationship commitment,information sharing and alliance performance with the help of data from 462 farmer households in Guangdong and Hainan provinces of China.The result shows that trust significantly and positively impacts relationship commitment and information sharing; relationship commitment has a significant and positive impact on information sharing; information sharing significantly and positively impacts alliance performance.Therefore,this paper suggests that managements of agricultural enterprises should not only pay much attention to the development of high level trust and relationship commitment with farmers,but also improve enterprise performance through more effective information sharing with farmers.