Coating pole piece anti-curl smoothing device and coating drying oven

The utility model provides a coating pole piece anti-curl smoothing device and a coating oven, the coating pole piece anti-curl smoothing device comprises a middle shaft and a first passing roller rotating around the axis of the middle shaft, the first passing roller is provided with a plurality of inner grooves arranged at intervals, and the plurality of inner grooves divide the surface of the first passing roller into a paste coating area and a blank area; supporting pieces are respectively arranged on the middle shaft on the two sides of the first passing roller, a second passing roller is detachably connected between the two supporting pieces, and a gap for a coated pole piece to pass through is reserved between the first passing roller and the second passing roller; the second passing roller is of an internal hollow structure and is provided with a smoothing bulge corresponding to the inner groove, the smoothing bulge is provided with a plurality of air holes, and air is supplied to the air holes through