Crop straw has great application potential, which contains a large number of mineral elements for crop growth and is an agricultural renewable resource. Straw returning can reduce the environmental pollution caused by straw wastes, realize the optimal allocation of resources, and contribute to improve soil quality and promote crop growth. The authors introduced the main methods of straw returning based on the research achievement of straw returning at home and abroad in recent years, the research progress of straw returning was introduced from the aspects of the main components of straw, the e...