Deacidification of modified Chinese tallow oil has been investigated using a strategy consisted of twice liquid-liquid extraction and deacidification process of D202 polymeric anion ion exchange.The effects of material ratio,reaction time and dosage of resin were investigated by central composite response design(CCRD) to obtain the optimum process.The optimum parameters were material ratio1:4.91,reaction time 7.28h,dosage of resin 9.23g.Under these optimum process parameters,acid value of modified lipid reduced to 0.11 mgKOH/g after deacidification of D202 resin.The sequences of three factors influenced on the deacidification of modified lipid were dosage of resin>extraction time>material ratio.