The invention relates to a converter body cooling method for disassembling converter by a dry method, which comprises the steps: 1) natural cooling stage, in which the operation of laser thickness measurement and the removal of a fender and a cover plate of a tapping hole is performed on the converter first, and the process is the natural cooling stage of the converter; and 2) forced cooling stage, in which compressed gas is blown, the converter at zero position is cooled and then is water-cooled, and finally a fan is started to suck away the heat. The compressed gas is one of nitrogen, argon, air and oxygen. The method has short cooling time, and effectively shortens the repair time.