This paper reports the fruits of the research on fundamental theory, application basis and application of laser heat treatment since 1979 in China. Also the technical development and spreading of laser heat treatment is reported. Over 20 academic exchange activities home or abroad were organized by our country. In China, there are near 1,000 units and about 5,000 intermediate and senior scientists and engineers engaged in the research, development and production of laser heat treatment. More than 3,000 academia articles have been published home and abroad. About 2,000 Bachelors, Masters and Doctors whose major is laser application have been cultivated. In domestic plants, near 1,000 production lines of laser heat treatment on the cylinder bodies and covers of automobiles and tractors have been set up, which were deeply welcomed by the automobile makers and repairmen. There are other production lines running in some factories and making good effects, such as laser glazing production line for steel ring, laser quenching production line for master reed in elastic shaft coupling and laser quenching production line for big gears, etc.