High-strength cutter bar connecting structure

The utility model relates to a high-strength cutter bar connecting structure, and belongs to the technical field of cutter structure design, the high-strength cutter bar connecting structure comprises a cutter head and a cutter bar, the cutter head is welded and fixed on the cutter bar, the surface, connected with the cutter bar, of the cutter head is a cutter head welding surface, and the surface, connected with the cutter head, of the cutter bar is a cutter bar welding surface. A plurality of strip-shaped grooves are annularly and evenly formed in the surface of the tool bit welding face in the radial direction, protruding parts are formed between the adjacent strip-shaped grooves, a plurality of strip-shaped protrusions matched with the strip-shaped grooves are arranged at the positions, corresponding to the strip-shaped grooves, of the tool bar welding face, and concave parts are formed between the adjacent strip-shaped protrusions. And the concave part is matched with the convex part. The welding surface