Abstract: The Agricultural Non-point Source Pollution (ANPSP), which is caused by pollution source like chemical fertilizers, pesticides, agricultural film and livestock breeding, has already become the largest source of pollution of our country's water pollution. The regulation of The Agricultural Non-point Source Pollution given by current legislation still has some deficiencies in guiding ideology, concrete content and legislative technique. This is caused by neglecting or lacking the thinking mode of economic law. The root cause of the deterioration of The Agricultural Non-point Source Pollution in China is the combined action of market failure and government failure. The task of overcoming double failure and controlling The Agricultural Non-point Source Pollution can be finished by using adjustment methods of economic law. The methods may include improving the environmental tax system, adding ecological taxation and establishing emission trading system.