In order to study the variation of the microstructure and properties of laser cladding alloy layer under the conditions of high temperature heat treatment .Laser cladding of Ni60 and Ni60+25%WC alloy coating on Q235 steel was achieved by using a continuous fiber lasers named YLS-4000. And made heat treatment on the two cladding samples by 600 ℃ and 10 h insulation by SXL-1030 programmable box furnace. The microstructure and properties of cladding samples was carried out by means of metallographic, SEM, XRD, high-temperature friction and wear equipment and micro-hardness equipment. The results show that Ni60 alloy layer microstructure dense needle-like crystals and dendrites. After high-temperature heat treatment, the crystal grains grow larger granular and the micro-hardness and wear resistance of Ni60 alloy layer slightly decline which exhibits good resistance to high temperature wear resistance; Ni60＋25%WC alloy layer has WC grains. . After high-temperature heat treatment, the WC grains distribute more uniformly which leads to the wear resistance and micro-hardness of Ni60+25%WC alloy layer improve.