Abstract: Four different filler alloys were selected according to the different active elements from two common solder systems of Ni base and Ag base. The diamond abrasive grains were brazed on steel with high frequency induction heating and were sheared with pushing experiment. Diamond failure process was recorded with high-speed camera in the shear process. The forces in the shear process were also recorded. The fracture features of diamond grains were observed. The diamond abrasive thermal damage and mechanical properties of filler alloys strength were also measured in this paper. The experiment results indicated that the main shear failure of diamond abrasive mainly include shear fracture and shear slip. The diamond abrasive thermal damage and mechanical strength of filler alloys have a close relationship with the abrasive failure. According to the experiment results, the established shear failure model of brazed diamond abrasive is in good agreement with the experiment results.