Comprehensive utilization of straw is one of the important measures to promote the green development of agriculture and rural areas,which is of great significance to the implementation of Rural Revitalization Strategy.The innovative design and development of supporting equipment is the basic guarantee to realize the large-scale and high-value utilization of straw.TRIZ(Teoriya Resheniya Izobreatatelskikh Zadatch)theory is an effective tool to promote independent innovation ability.This paper summarizes the application method of TRIZ theory system and its practice in the research and development of straw bundling,crushing and molding devices and all-in-one machines,and analyzes its existing problems and innovation keys,aiming to provide reference for the comprehensive upgrading and improvement of straw comprehensive utilization equipment.