Abstract: Risk trend of pesticide residue parameters in 5280 vegetable samples from Inner Mongolia farmland since 2003s were studied.The results showed that in the past eight years exceeded 75% of the pesticides exceeded the probability is less than 5%,20% of the pesticides exceeded the probability of greater than 10%,the high-risk types of pesticide residue parameters were seleted by different type vegetables,for example carbofuran,phorate,Omethoate and chlorpyrifos,but methamidophos outside.The changes of exceeding rates was difference obviously,organic phosphorus pesticide stable reduced,organochlorine and pyrethroid pesticides increased year by year,carbamate and other nitrogen-containing pesticides exist by chance fluctuations.Of highly toxic pesticides,especially the control of a new pesticide will be the focus of pesticide regulation.