Abstract: In view of the demand for film covered cotton interplanted in wheat field, 2BMW-2 assembly machine of sowing, spraying and film covering was developed according to the combination of function, structure and property. It awarded practical new type patent of China. The practice showed that it fulfils agronomic technical requirements of “sowing precisely→ spraying herbicide→ covering film→ shaping the ditches” completely. The machine has extensive value of the popularization in the interplanting of cotton-wheat regions.