Double speed chain conveyor line is a kind of conveying equipment widely used in automated assembly line.Its mechanical part mainly consists of a driver head(motor, tooth box, transmission Sprocket, etc.), a transmission section, a tensioning tail, and an electric control box. Special aircraft or auxiliary aircraft can also be configured according to the product process needs to complete the required functions. Each work position completes its own corresponding work according to the requirements of the work level process instruction. The transmission line is automatic and can be configured as a forced beat or free beat to ensure higher productivity.