The invention relates to a battery conductive strip dismantling method, a dismantling device and a dismantling drilling bit. The device comprises a rotary power mechanism and the drilling bit, the drilling bit comprises a drilling bit body, the drilling bit body is provided with a central positioning protrusion, the end face of the drilling bit body is provided with a cutting blade, the projectionof the cutting blade in the axial plane of the drilling bit body is perpendicular to the axis of the drilling bit body. The device has the advantages that the surface drilled by the cutting blade isflat, and the completeness of an pole can be ensured under the situation that the conductive strip is cut; a positioning hole on the conductive strip cooperates with the central positioning protrusionto allow the rotary axis of the drilling bit to be coaxial with a positioning hole formed in the conductive strip, it is ensured that the part, located on the top of the battery pole, of the conductive strip can be accurately cut when the battery conductive strip dismantling device is operated, the remaining part of the conductive strip directly releases from the battery pole because battery poles are not connected, and therefore the efficient dismantling with low labor intensity of the conductive strip is achieved.