The NiCrBSi coatings are produced by the laser cladding technique. The microstructures and phases of these coatings are analyzed. The wear tests are carried out at different temperatures. The evolution of microstructures and the wear mechanism at high temperatures of 700 ℃ and 750 ℃ are discussed. The applicable working temperature range of coatings is determined. The results show that the coatings are mainly composed of γ-Ni, Cr3C7, CrB, and Ni-B-Si eutectics. At the temperature of 700 ℃, the reinforced phases of Cr3C7 and CrB are kept stable, and the eutectics are slightly decomposed. The wear resistance is a little lower than that at room temperature, and the wear mechanism is adhesion wear and abrasion wear. In contrast, at the temperature of 750 ℃, Cr3C7 and the eutectics are obviously decomposed, but CrB is kept stable. As a result, the coating is severely worn and softened. Moreover, the fins are formed at its periphery. The coating is subjected to failure due to severe plastic deformation.