Fe-C-Mo-V hardfacing alloys wear samples are prepared by GMAW welding technology. Dry sand abrasive wear tests are carried out based on the rolling three-body abrasive environment,and scanning electron microscope,energy spectrum analysis,Vickers hardness tester and other microscopic analysis and performance testing methods have been used to detect and characterize the wear loss and wear scar morphology of the FeC-Mo-V hardfacing alloy deposited metal. The changes in wear behavior of the deposited metal under different normal load conditions are studied. The results show that with the increase of normal load,wear loss gradually increases,but the increase gradually slows. The wear mechanism of the hardfacing alloy is the plowing effect on the austenite matrix by abrasive grains,and the VC hard phase,lamellar eutectic structure to flake.After the wear, the surface hardness increases gradually with the increase of normal load,and the subsurface of the wear mark produces significant work hardening,and the austenite matrix transforms into martensite structure,which enhances the hardness of the material and makes the deposited metal exhibit good wear resistance under high load.