The behavior of agricultural association has produced an important impact on the quality of agricultural products. This paper applies game theory to develop a model and analyzes the positive impacts caused by agricultural association on the behavior of government regulation. When the agricultural association participates in controlling agricultural products safety, the performance of government regulation can be improved effectively. The conclusion of model analysis is that the improvement of government regulation should be based on the mechanism of which government and agricultural association participates in controlling agricultural products safety risk together.