A method for extracting, clearing off and determining the residues of cyhalothrin, escy-permethrin, fenvalerate and deltamethrin in soil was established. In this method the residues of the pesticides in soil were extracted by acetonitrile and purified by H2SO4-ethanol, then measured by GC. The recovery of the method ranged from 84.14% to 105.15%, with CV from 1.24% to 5.82%. This method was proved to be low in cost, easy in operation, and high in purification, reproductivity and feasibility.