Enhanced bioremediation technology composed of a sewage sludge and intermittent aeration strategy increased the removal rates of HCH and DDT by 16.8%–80.8% in 10 days. Sewage sludge is an alternative organic carbon source that improves efficient degradation by microbes, and can therefore improve the biodegradation of pollutants. Anaerobic degradation of o,p′-DDT, p,p′-DDT and β-HCH was the dominant reaction in this study, accounting formore than 50% of the total degradation; however, the aerobic removal rate of α-HCH was the dominant reaction. Intermittent aeration met the different oxygen requirements of DDT and HCH degradation, and the enhanced bioremediation technology resulted in an increase in temperature to 30–70 °C, and the higher temperature was also beneficial to the degradation by microbes.