激光熔覆是一种先进的表面改性技术，在航空航天、石油化工等领域应用广泛。本文综述了激光熔覆裂纹的研究进展，阐述了裂纹的分类、形成机理和检测方法，并从优化工艺参数、优化覆层设计、优化粉末组成、优化工艺方法等方面，总结了防控裂纹的应对措施，并提出了一些解决覆层开裂问题的建议以及今后的研究方向和思路。

Laser cladding, an advanced surface modification technique, is widely applied to aerospace, petrochemical, and other fields. Herein, the research progress with respect to cracks in laser cladding coating is reviewed. Furthermore, the classification, formation mechanism, and detection methods of cracks are described. In terms of the optimization of process parameters, cladding design, powder composition, and process methods, the countermeasures to prevent and control cracks are summarized; some suggestions to solve the problem of cladding cracks and future research directions and ideas are suggested.