Abstract: With the popularization of agricultural machinery and tools, plastic mulching seeder and plastic mulching transplanter more and more tools, plastic mulching machine operation quality directly affects the rate of seedling emergence and the survival rate of seedlings.Through the design and research of the key components of the mulching machine, the key problems affecting the quality of mulching in the process of mulching were designed and calculated, and the key parameters of the mulching machine were determined, and the field test was carried out, the film laying effect was higher than the national standard requirements, which solved the difficult problem of organic film laying operation in wheat intercropping.