Gravure roller and gravure coating machine

The utility model discloses an intaglio roller and an intaglio coating machine, the intaglio roller comprises a roller body, a coating area is arranged on the surface of the roller body, the coating area comprises a first reticulate pattern area and a second reticulate pattern area, the second reticulate pattern area is adjacent to the first reticulate pattern area, the second reticulate pattern area is located on the outer side of the first reticulate pattern area, and the first reticulate pattern area is adjacent to the second reticulate pattern area. The first reticulated area comprises a plurality of first coating grooves, the second reticulated area comprises a plurality of second coating grooves, and the depth H1 of the first coating grooves is larger than the depth H2 of the second coating grooves; after coating, the first reticulate pattern area can be effectively coated at the corresponding position of the coating area of the battery current collector to form the thinned areas, the thinned areas are