介绍了激光熔覆技术的特点及其在材料表面改性中的应用概况，回顾了利用激光熔覆技术制备梯度功能涂层的国内外研究现状。经分析认为，外加强化相与基材热物性差别大是导致涂层开裂失效的主要因素。利用原位合成和基于快速原型的激光直接制造技术制备梯度功能表层或构件是将来的发展方向。

The characteristics of laser cladding and its application status quo in surface modification of metallic alloys is introduced,and then the research status quo of fabrication of functionally gradient coating using laser cladding is reviewed. After analysis,it can be found that the different thermophysical parameters between the reinforced particle and matrix are the main reason to cause crack and failure of coating. Fabrication of in-situ synthesized and functionally gradient composite coating or components using laser direct fabrication technique is the future development direction.