The invention relates to the field of high-voltage electrical appliances, provides a device and a method for correcting watchband contact finger assembling tolerance, and the problem that a part is scratched caused by inconsistent protruding height of contact fingers due to repeated watchband contact finger assembling can be solved. The device for correcting watchband contact finger assembling tolerance comprises a base; a fixing structure used for fixing the contact finger of the watchband is arranged on the base; the device further comprises a rolling wheel or a pressing block which is usedfor performing guiding movement along the extending direction of the watchband contact finger fixed on the base; the distance between the rolling wheel or the pressing block and the base can be adjusted so as to adjust the jacking force of the rolling wheel or the pressing block to the contact finger of the watchband. The watchband contact finger is fixed on the base, and the rolling wheel or thepressing block is used for rolling the contact finger of the watchband, so that the protruding height of the contact fingers is kept consistent, and the situation that a plurality of times of test assembling is needed is avoided, and scratching to other parts caused by the contact fingers with different heights is lowered.