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.