The application of chemical pesticides affects people’s health and sustainable development of agriculture.Biological pesticides meet the need of friendly environment,but it has some disadvantages,such as its high price,insufficient propagation,slow effect,shortage of variety and so on.So propagation work should be strengthened.Firstly,strengthening the examination of agricultural products to promote the farmers’ activeness of using biological pesticides;secondly,promoting the research and development of biological pesticides to support the development of biological pesticide.