The invention relates to the technical field of battery processing equipment and provides a battery seal welding method. The battery seal welding method comprises the steps that a battery is fixed toa pressing block and an ejecting pin, a head of a welding gun exactly faces a seal of the battery, a servo motor is started to make the battery rotate, and the welding gun is started to weld the seal.According to the battery seal welding method, the two ends of the battery are fixed through the pressing block and the ejecting pin respectively, as point-type contact serves as a contact mode of theejecting pin and the battery, centering is facilitated in clamping, the run-out error of the battery can be relieved in rotation of the battery, and the welding quality can be improved.