The laser heat treatment is a processing method of heat treatment on the surface of the metal part with a higher power density laser beam, mainly including laser surface hardening , laser annealing , laser surface alloying(lsa) and laser surface coating, it is width applied to machinery manufacturing, equipment maintenance, mold manufacturing, etc. It has gradually been recognized and adopted because of its unique characteristics.In this paper, focusing mirrors for improved key-parts of the laser heat treatment equipment have been analyzed and introduced, and pointed out the problems which should be noticed in the improvement.