Water-cooling bone saw

The invention discloses a water-cooling bone saw which comprises a saw grinding device and a supporting rod assembly, the saw grinding device comprises a saw blade, one end of the saw blade is provided with a saw handle, and the saw handle is provided with a plane section; the supporting rod assembly comprises a connecting sleeve connected to the outer pipe in a sleeving mode, the saw handle is inserted into the connecting sleeve, a water through hole is formed between the inner wall of the connecting sleeve and the saw handle, the inserting end of the saw handle is connected with a connecting shaft, the connecting shaft penetrates out of the outer pipe and is connected with the handle, and the supporting rod assembly is arranged between the corresponding positions of the supporting rod assembly and the handle. A water outlet channel is defined by the corresponding parts of the supporting rod assembly, and one end of the water outlet channel is further communicated with the water through hole. The transmissio