The invention discloses a winding auxiliary device for lithium battery production, belonging to the technical field of lithium battery production equipment. The winding auxiliary device comprises a fixed bottom plate, wherein two sides of the upper end of the fixed bottom plate are provided with supporting frames, the upper end of the left supporting frame is provided with a conveying shaft, the middle part of the conveying shaft is provided with a conveying wheel, the middle part of the right supporting frame is provided with a transmission shaft, the middle part of the transmission shaft isprovided with a winding wheel, the middle part of the front end of the winding wheel is provided with a winding shaft, the middle part of the winding shaft is provided with a fixed groove, the middlepart of the fixed bottom plate is sequentially provided with a detection mechanism, a cutting mechanism, a flattening roller group and a flattening block from left to right, the detection mechanism comprises a U-shaped frame, an ultrasonic transmitter is arranged at the upper end inside the U-shaped frame, an ultrasonic receiver is arranged at the upper end inside the U-shaped frame, and the cutting mechanism comprises a cutting cylinder and a cutting block. According to the scheme of the invention, the detection and cutting of pole pieces in the winding and conveying process can be realized through the cooperation of the detection mechanism and the cutting mechanism, so that the winding quality of the pole pieces in the later period can be greatly increased, and the advantages of strong practicability and high reliability can be achieved.