Disassembling tool for gear and coupler of reduction gearbox of rolling mill

The invention discloses a disassembling tool for a gear and a coupler of a reduction gearbox of a rolling mill. The disassembling tool comprises a machine base, a first jacking plate, wherein the first jacking plate is arranged on the machine base and is provided with a first plate surface and a second plate surface which are oppositely arranged, a clamping groove is formed in an abutting surface,the clamping groove is used for allowing an output shaft of the reduction gearbox of the rolling mill to pass through and penetrating through the first jacking plate, and a transmission component connected to the output shaft abuts against the first plate surface of the first jacking plate; and a pushing mechanism, wherein the pushing mechanism is arranged on the machine base and is opposite to an inner plate surface, and the pushing mechanism is used for being in transmission connection with the end part of the output shaft and is used for pushing the output shaft of the reduction gearbox ofthe rolling mill from the