Comparison test of activated carbon adsorption technology and resin adsorption technology treating DIBP wastewater was conducted. Results show that resin NDA-66 has the best adsorption effect on phthalic acid, whose removal rate reaches 93. 9%. Followed by coconut shell activated carbon, COD and phthalic acid removal rate were 57. 3% and 83% respectively in waste water of plasticizer. Coal quality and nut shell activated carbon effect is rather poor, whose removal rate of COD and phthalic acid are around 20%. Also, activated carbon adsorption is not selective, cannot recycle phthalic acid and does not produce the corresponding economic benefit. While using the NDA - 66 resin adsorption processing plasticizer DIBP production wastewater, the pollutants reduce 4 ~ 5 times that of activated carbon adsorption. Also, recycling the O-phthalic acid can produce the economic benefits of 1. 108 million yuan annually. At the same time, it is easy for stripping of resin to regenerate, which can be used and reused for 2 years. Thus it has greater value of popularization and application.