The invention relates to a testing machine for impact resistance, corrosion resistance and wear resistance of a metal material. The testing machine comprises an experimental environment simulation part and an electrochemical microcomputer test and control part, wherein the experimental environment simulation part comprises an impact hammer, a main shaft and a corrosion wear groove, one end of the main shaft is connected with a driving device, the other end of the main shaft is inserted into the corrosion wear groove, an annular working electrode sheathes the main shaft inserted into the corrosion wear groove, the working electrode rotates along with the main shaft, the working electrode is insulated with the main shaft, the impact hammer is arranged at the upper part of the working electrode, the lower part of the impact hammer is fixedly connected with an upper sample, service conditions of raw material workshop ball grinding mill lining plates of mines, machinery and the like are combined, and an electrochemical measurement and control system is arranged on an impact wear testing machine, so that the new testing machine can more definitely simulate impact, corrosion and wear conditions of a ball grinding mill lining plate and also can more scientifically carry out research on interaction of impact wear and corrosion of a metal material, and the testing machine is reasonable in design and simple in operation, runs stably and has good reproducibility.