Milling cutter with cutter head convenient to replace

The utility model relates to the technical field of processing equipment, and provides a milling cutter with a cutter head convenient to replace, which comprises a milling cutter, a plurality of fastening holes are arranged on the side wall of an assembly groove, the cutter head is arranged in the assembly groove in a penetrating manner, a concave connecting piece is connected onto the cutter head, and a plurality of sinking grooves are further arranged on the connecting piece. A pressing assembly corresponding to the fastening hole is arranged on the inner wall of the same side of the assembling groove and comprises a cushion block and a limiting block, the cushion block and the limiting block are provided with the same clamping block in an erected mode, a gap allowing the connecting piece to penetrate through is formed between the clamping block and the limiting block, the clamping block can be clamped in the sinking groove, a fastening shaft penetrates through the clamping block, and the clamping block is