Chilo suppressalis(Walker) was the major pests in rice fields in northern Hunan,which had great effect on rice quality and yields.The anatomy of overwintering Chilo suppressalis(Walker) larvae focused on the location of its internal organs and structures,the digestive system,central nervous system,respiratory system,body fat and the basic structure and function of the reproductive system.It was of great significance to the forecast and scientific control of Chilo suppressalis(Walker).