Increasing Farmers' income has already become the core of the problems relating to famers, rural areas and agricultural development in our country. However, since long ago, the growth problem of farmers' income has continuously puzzled our country's rural economy development. The author believes that the basic way to realize the growth of farmers' income is to reduce farmers' quantity. In recent years, "short of laborers" has told us that farmers' quantity can not be reduced blindly. We have to clarify the concept and types of farmers firstly in the new time and reduce the farmers' quantity step by step. Only then it has the practical significance. This article takes Anhui province as an example and explains the necessity of reducing the fanners' quantity from Anhui rural economic change, and it gives some correlation suggestions.