Abstract: The paper studied the control effect of 70% ZF with the treament of 100kg seeds 140g,280g,560g and 840g（effective content）on rape striped flea beetles.The results showed that control effect reached 74.7%～79.3%,control effect of 70% ZF was higher than that of the control.Taking the control cost into acoount,the recommended dosage of thiamethoxam ZF for controling rape striped flea beetles was 100kg seeds 140g.