Abstract: The polymer-containing oily sludge from Dongying Shengli oilfield was treated by the self-developed extractant ZYHM. The optimum technological conditions were determined by studying the effects of agent-mud ratio, extraction temperature, stirring speed, stirring time and extraction degree on the oil removal efficiency and recovery efficiency of extractant. At the conditions of room temperature, the ratio of extractant and sludge is 3:1, 30 min stirring time at 160 r/min rotational speed, the oil removal rate can reach 93.6%, and the oil concentration of sludge is decreased to 0.66%. The extractant ZYHM can be recovered by vacuum distillation, and the recovery rate is 97%. After 6 times of recycling, the oil removal rate of the extractant ZYHM can still reach 90%. Compared with the traditional extractant, the cost of extractant ZYHM is reduced by 30%, and it has higher removal efficiency and better recycling effect.