Lathe tool convenient to replace

The lathe tool convenient to replace comprises a tool handle and a tool bit, a positioning groove is formed in the front end face of the tool handle, a guide column is arranged on the front end face of the positioning groove, a guide hole is formed in the tool bit, the tool bit and the tool handle are connected in a sliding mode through the guide column and the guide hole, a sliding rail is arranged on the front end face of the tool handle, and a pressing rod is arranged in the sliding rail. Ratchets are arranged on the lower end face of the pressing rod, and pawls are arranged on the front end face of the cutter handle. Through cooperation of the pressing rod, the pawl and the blade, after the blade is inserted into the positioning groove, the pressing rod is rapidly pushed to the front end of the blade, the blade is gradually pressed by the pressing rod, external tools are not needed, convenience and rapidness are achieved, the overhauling efficiency of the blade is greatly improved, and through the elastic