The invention relates to an adhesive tape sticking device. The adhesive tape sticking device comprises a machine frame, an adhesive tape paying-off device, an adhesive tape driving device, an adhesive tape cutting deice, an adhesive tape adsorption device, a press wheel device and a conveying device, wherein the adhesive tape paying-off p device and the conveying device are arranged on the machine frame, the adhesive tape paying-off device comprises an adhesive tape paying-off mechanism and an adhesive tape conveying mechanism, the conveying device comprises a first installation plate and a first movement mechanism, a second installation plate is arranged on the first installation plate, the adhesive tape driving device is fixed to the second installation plate, and the adhesive tape adsorption device and the press wheel device are fixedly arranged on the rear side of the adhesive tape driving device sequentially. The adhesive tape cutting device is arranged between a seventh idler wheel and a ninth idler wheel and comprises a fourth air cylinder, a cutter connecting plate, a cutter and a guide seat. The adhesive tape sticking device can automatically stick adhesive tape to a welding strip of a battery piece, and improve the conversion efficiency of a battery string.