Pole piece manufacturing method and pole piece manufacturing device

The invention provides a pole piece manufacturing method and a pole piece manufacturing device. The manufacturing method of the pole piece comprises the following steps: S100, coating a current collector with active substance slurry; s200, the active substance slurry is dried so that an active substance layer can be formed by the active substance slurry, the active substance layer is provided with a main body area and a thick-edge area, the current collector comprises a tab which is not covered by the active substance layer, the thick-edge area is closer to the tab compared with the main body area, and the thickness of the thick-edge area is larger than that of the main body area; and S300, the thick-edge area is mechanically polished. The thick-edge region is thinned in a mechanical polishing manner, so that the thickness of the thick-edge region is basically consistent with that of the main body region, the gap between the positive and negative pole pieces is favorably reduced, and the energy density of the