Abstract: The discharge amount of livestock waste， livestock nutrient load of agricultural land and the risk assessment of livestock and poultry waste in Shanxi reservoir area in Wencheng County were investigated by field investigation and GIS combined with vector processing method. The results showed that the farmlands of Wencheng County were widely and seriously polluted by livestock waste， and more than 80% of farmlands were threatened. Livestock waste of pig breeding was the main sources of pollution. In future， breeding scales of pig should be controlled reasonably， the transformation of the animal husbandry should be accelerated， and the realization of ecological sustainable development should be promoted.

Key words: Shanxi reservoir, livestock waste, livestock nutrient load of agricultural land, risk assessment, prevention countermeasures