A multiresidue method using gas chromatog. (GC) and gas chromatog./mass spectrometry (GC/MS) was developed for the determination of several organochlorine pesticides in three crude drugs: Astragali Radix () Zizyphi Sativae Fructus () and Zingiberis Rhizoma ().The pesticides including α-BHC, β-BHC, γ-BHC, δ-BHC, 2,4'-DDE, 4,4'-DDE, 2,4'-DDT and 4,4'-DDT were determined using a modified extraction and refining procedure, separated by a capillary column (DB-1, 0.25 μm, 0.25 mm × 30 M), observed with an electron capture detector (ECD), and confirmed by GC/MS if necessary.The precision and accuracy were satisfactory.Calibration graphs of eight pesticides were constructed in the range of 0.25 - 2.0 μg/mL and their correlation coefficients (r) were in the range of 0.995 - 0.998.Recovery studies were performed at the 1.0 ppm spike level of each pesticide in these three crude drugs.Recovery rates were 66.4 - 98.0% for Astragali Radix, 36.7 - 86.9% for Zizyphi Sativae Fructus, and 31.1 - 109.7% for Zingiberis Rhizoma.Coefficients of variation were between 2.3 and 4.9%.The estimated limits of detection of the pesticides were all below the 0.06 ppm level.Coefficients of variation ranged between 6.3 and 10.2%.This anal. method could be also applied to concentrated Chinese medicines.