The invention provides a tape sticking device, which comprises a support frame, a power mechanism for driving the support frame to move, and a tape sticking and driving mechanism. The support frame is provided with a tape sticking roller capable of rotating around the self central axial line; the sticking roller is provided with a tape absorbing block communicated with a vacuum system; and the tape sticking and driving mechanism and the tape sticking roller form a driving matched relationship which makes the tape sticking roller rotate around the self central axial line. By adopting the tape sticking device, tapes can be stuck on pole pieces and rolling cores in a non-tightening state, thereby reducing the pressure on battery cells caused by the tension of the tapes and further reducing disadvantage influences on the battery performances. Meanwhile, the consumtion of the tapes is less, thereby reducing the occupation of the tapes to the inner space of the battery, being beneficial forreducing the cost and improving the utilization efficiency and the capacity of the battery; and the tape sticking device has simple structure and easy implementation.