Abstract: In order to improve the wear resistance of Q235 steel, a Ni/316L coating was coated on Q235 surface by laser cladding and the heat treatment at 680 ℃ for different time was carried out. Scanning electron microscope（SEM）, energy dispersive spectrometer（EDS）, microhardness tester were used to study the microstructure, microhardness and elastic modulus of the coating. The results show that the laser cladding layer has low porosity, and the mirostructure is mainly grown in the form of needle like dendrite perpendicular to the substrate. The microstructure changes from acicular dendrites to fine equiaxed grains after heat treatment. The maximum hardness of the surfacing layer appears in the fusion zone after different time of heat treatment. The heat treatment can improve the elastic modulus of the surfacing layer in a certain content.