Abstract: Objective To knoworganop hosphorus pesticide residues in the vegetables and fruits sold in markets of Harbin.Methods The method of GB/T5009120-2003 was applied to determine the contents of seven organop hosphorus pesticides in samples selected randomly.Results Totally 200 vegetable samples and 130 fruit samples were collected.Four kinds of organop hosphorus pesticides(methamidop hos,dichlorvos,folimat,and isocarbophos)were detected in vegetables.The folimat banned was detected in 20 vegetable samples with a detection rate of 12.0%.The unqualified rate of all vegetables,leafy vegetables,starchy vegetables and melon vegetables were 17.0%,11.0%,0.5%,and 5.5%,respectively.Three kinds of organop hosphorus pesticides(metham idophos,dich lorvos and folimat)were detected infruits with a unqualified rate of 3.08%.Conclusion There are organophosphorus pesticide pollution in vegetables and fruits in the markets of Harbin city.The refore,it is necessary to streng then the surveillance and study of organophosp horus pesticide residues.