Multifunctional narrow return-to-empty conveying line vehicle maintenance equipment

The utility model discloses a multifunctional narrow empty return conveying line vehicle maintenance device which comprises a yarn vehicle transportation structure, a yarn vehicle cleaning structure, a yarn vehicle performance detection structure, a device installation stand column and a PLC control system. The yarn trolley conveying structure comprises a yarn trolley (1) and a return-to-empty conveying belt (2). The yarn trolley (1) is arranged above the air returning conveying belt (2); the return-to-empty conveying belt (2) is arranged in the middle of the yarn vehicle cleaning structure and the yarn vehicle performance detection structure in a penetrating manner; the yarn vehicle cleaning structure and the yarn vehicle performance detection structure are sequentially arranged on the equipment installation stand column in the conveying direction of the air returning conveying belt (2). According to the utility model, by adopting the design of one machine with multiple purposes, the problem that the occupie