With the development of metallurgical technology, various kinds of high-quality stainless steels are emerging. Although the metallurgical industry can continuously develop high-quality steel, it needs correct heat treatment to better play the function of stainless steel. During the heating and cooling process of stainless steel with different steel grades, the transformation of matrix structure, the formation and transformation of carbon, nitride and intermetallics are different, which have different effects on the properties of stainless steel. Therefore, the appropriate heat treatment process should be selected according to the steel type and purpose of use during the heat treatment of stainless steel.