A steady detection method for HCH and DDT residues in sediments is developed by improving the front disposal measure and chromatogram condition, which accords with the requirements of laboratory measurement for batch samples. The sample is extracted by acetonehexane (1∶1) mixture with 2g copper for removing sulfide. The extraction is purified by Florisil SPE column and CarbonGCB SPE column and eluted by acetonehexane(1∶9)mixture. The concentration is analyzed by gas chromatograph equipped with DB1701 column, quantified by the external standard method. The average recovery of added test in sandy sediments is between 74.5% and 92.0%, and the RSD% is between 3.09% and 6.67%. The detection limit is:α-HCH:1.96×10^-4 mg/kg， β-HCH：1.45×10^-6mg/kg，γ-HCH：1.90×10^-4 mg/kg， δ-HCH：1.98×10^-4mg/kg， p,p′-DDD:2.47×10^-6 mg/kg， o,p′-DDT：1.08×10^-4mg/kg， p,p′-DDE：1.59×10^-4 mg/kg， p,p′-DDT：2.52×10^-4mg/kg. The method is verified by the added test on muddy sediments, and the recovery and RSD% meet the detection requriements of pesticides residue in sediments.