Dismounting tool

A dismounting tool comprises a dismounting base, a thrusting rod, a supporting frame, a tension bar, a tension cover and a balance rod. The dismounting tool is characterized in that the supporting base is arranged on a transmission shaft of a metering pump in a sleeving mode, the thrusting rod and the supporting frame are connected, the tension bar is located in the tension cover, the tension bar and the tension cover are connected into a whole through the balance rod, the thrusting rod is inserted into a circular hole of the supporting base, the tension cover is locked, the balance rod abuts against a groove in the top end of a short shaft of the transmission shaft of the metering pump, and the thrusting rod is rotated so that the short shaft of the transmission shaft of the metering pump can be dismounted. The dismounting tool is simple in structure and capable of more conveniently dismounting the short shaft of the transmission shaft of the metering pump, reduces labor, saves time, improves the working efficiency, eliminates potential safety hazards and meanwhile prolongs the service life of equipment.