This study was carried out to determine the 11 organochlorine, 7 organophosphorus residual pesticides in 251 crude drugs. These residual pesticides in herbal drugs were extracted with acetonitrile and the extracts were cleaned up via LC-florisil solid phase extraction column. The prepared samples were assayed for pesticide residues using GC-ECD, NPD with capillary column and identified by GC-MSD. Recoveries were $63.9{sim}111.5%$ in the organochlorine pesticides and $69.8{sim}92.4%$ in the organophosphorus pesticides, and detection limits were $0.001{sim}0.65;ppm$ in the organochlorine pesticides and $0.0009{sim}0.0074;ppm$ in the organophosphorus pesticides. Pesticide residues were detected in 9 cases.