The invention provides a method for calibrating a UHF partial discharge measurement device, which comprises the steps of 1, constructing a field strength measurement system; 2, placing the UHF partial discharge measurement device and a reference field strength meter in the field strength measurement system, and measuring the field strength of the same electric field; and 3, comparing output signals of the UHF partial discharge measurement device and the reference field strength meter, and determining the measurement accuracy of the UHF partial discharge measurement device. Compared with the prior art, the method provided by the invention for calibrating the UHF partial discharge measurement device avoids a problem that a radio frequency signal source is too great in attenuation in the measurement environment and difficult to be controlled through building a relatively stable electric field environment.