Abstract: In this study, the larva of flour beetle as the object has been used in research, and it been shocked by the high voltage pulsed discharge equipment to get data of lethal rate, the experiments in air were carried out. Different combinations of needle and plate electrodes used in the test and used varying electrode spacing in the insulating chamber. The voltage scale of high frequency electric pulse set to 5 kV, 10 kV, 20 kV and 50 kV respectively. Different discharge times were also set to get the lethal rate of flour beetle under different environment of electric fields. The test results showed that the higher voltage and lower electrode gap would increase electric field strength that improved lethal rate; the needle-plane electrode had the best killing effect in this test; and the lethal rate was stable and the growth is not obvious after 15 s operation time.