Coal mill capable of prolonging service life of striking wheel

The utility model relates to the technical field of mechanical equipment, in particular to a coal mill capable of prolonging the service life of a striking wheel, which can effectively enhance the wear resistance of the striking wheel, reduce the maintenance frequency, reduce the maintenance workload, prolong the running time of the equipment, improve the working efficiency, keep the equipment normally running and reduce the use limitation. The device comprises a bottom plate, a grinding barrel, a grinding motor, a grinding speed reducer, a rotary grinding disc, three groups of grinding wheels, a driving motor, a driving speed reducer, a striking wheel, a feeding bin and a discharging pipe, four groups of supporting legs are arranged at the bottom end of the bottom plate; the grinding barrel is fixedly mounted at the top end of the bottom plate; a grinding shaft is arranged at the output end of the grinding speed reducer, the striking wheel is located in a working cavity of the grinding barrel, the feeding bi