Rubber gasket punching device

The utility model discloses a punching device for a rubber gasket. The punching device comprises a bearing disc, a compression joint plate arranged above the bearing disc, a punching mechanism arranged above the compression joint plate and provided with a plurality of tool bits and a driving mechanism capable of controlling the tool bits and the compression joint plate to move in the direction close to or away from the bearing disc. The lower side face of the crimping plate is connected with a first convex part located in the middle and a second convex part arranged around the first convex part, and an annular matching groove is formed between the first convex part and the second convex part; the annular matching groove comprises a first abutting wall formed by the outer side face of the first protruding part and a second abutting wall formed by the inner side face of the second protruding part. The annular matching groove corresponding to the rubber gasket in shape is formed in the lower side of the crimping