To obtain a new method of pesticide residue degradation in fruits and vegetables, the effect and influence factors of omethoate residue degradation Chinese cabbage and apple were studied by using plasma. The results showed that plasma had an excellent effect on omethoate residue-degraded in Chinese cabbage and apple. The omethoate could be degraded by over 95% within 1.5 minutes. Besides, the effect of plasma on omethoate residue degradation in Chinese cabbage was superior to that in apple. As color difference and Vc quantity in samples processed by plasma were the same as in control group, it was concluded that omethoate residue by using plasma had no passive effect on the characters of fruits and vegetables.