Long bone diaphysis windowing osteotomy device

The invention discloses a long bone diaphysis windowing osteotomy device which comprises a drilling assembly and a cooling assembly, the drilling assembly is detachably arranged in the cooling assembly in a sleeved mode, and the drilling assembly and the cooling assembly are each provided with a plurality of drilling holes and cooling holes at intervals in the linear direction, and the drilling holes and the cooling holes coincide and correspond to each other. The cooling assembly is also of a square structure, an embedding cavity matched with the drilling assembly to be embedded and arranged in a penetrating mode is formed in the cooling assembly, a cooling hole penetrating to the outer portion of the bottom side of the cooling assembly is formed in the bottom of the embedding cavity in a penetrating and extending mode, and a cooling structure communicated with the cooling hole is further arranged on the cooling assembly. According to the osteotomy device, through cooperation of the drilling assembly and the