The efficiency of microwave treatment to kill Callosobruchus chinensis (L.) weevils was assessed. The bare adults of the weevil, adults mixed with adzuk beans, larvae living in mung beans and eggs on mung beans were treated with different microwave power and exposure time, and its effects on the adult oviposition, larva emergence and egg hatching of the weevil and the germination rate of adzuki beans were observed. The results showed that when the bare adults were treated with microwave, the adult mortalities increased with the exposure time and microwave power, and more than half of adults were killed after being treated with midhigh power for at least 60 s or high power for at least 50 s, with a mortality of 51.21%－99.92%. When the adults mixed with the adzuki beans were treated, the varying tendency of adult mortalities under different treatments of microwave power and exposure time was similar to that of the bare adults, but the mortalities of adults mixed with adzuki beans were obviously higher than those of the bare adults at the same treatment conditions, and 55.75%－100% of adults were killed under the following treatments:  low to mid power for at least for 60 s, defrost power for at least 50 s or mid to high power for at least 40 s. All adults were killed when treated with mid power for 70 s or mid-high power for at least 60 s. Microwave treatment had aftereffects on C. chinensis, higher adult mortalities were found in the treatments than in the control even if the adults did not die immediately after being treated. The adult corrected mortalities on the 3rd day after being treated reached 87.74%. Microwave also decreased the adult oviposition, larva emergence, egg hatching and germination of adzuki beans. The susceptibility of adult, egg and larva living in mung beans to microwave was from low to high. As high as 51.67%－99.79% of adzuki beans failed to germinate under the following treatments: mid power for 60 s, defrost power for 50 s, mid power for 40 s, mid-high or high power for 30 s. It was so concluded that microwave treatment had prominently lethal effects on C. chinensis.When using microwave to eliminate pests from agricultural products, however, many factors, such as microwave machine, treating power and time, usage and water content of agricultural products and so on, should be considered and optimizing experiments should be performed to achieve the best results.