The invention discloses a method for determining corona discharge ultraviolet detection sensitivity of high-voltage electrical equipment. The method mainly comprises the step of utilizing an electronic ignition gun to simulate corona discharge and formulating a detection sensitivity standard, the step of improving the electronic ignition gun, and the step of carrying out the test through the improved electronic ignition gun and formulating the detection sensitivity. The method for determining corona discharge ultraviolet detection sensitivity of the high-voltage electrical equipment can overcome the defects that in the prior art, operation difficulty is large, accuracy is poor and reliability is low, and the method for determining corona discharge ultraviolet detection sensitivity of the high-voltage electrical equipment has the advantages of being low in operation difficulty, high in accuracy and high in reliability.