Abstract: China is a large agricultural country with abundant crop straw resources,but a large number of data show that the utilization rate of straw is not high,most of straw are discarded or burned on the spot,which causes many problems to the environment.The results show that part of straw had certain control effects on plant diseases,insect pests and weeds,while different straw and different application methods had different effects.Therefore,this study expounded the application ways and methods of crop straw in the prevention and control of plant diseases,insect pests and weeds from three aspects,which could provide references for improving the utilization rate of crop straw.