the use of cardanol polyoxyethylene ether (BGF-10) and acrylic acid (AA) as raw materials, through the direct esterification method, hydroquinone phenolic polymerization was synthesized under the catalysis of hydroquinone as a polymerization inhibitor and p-toluenesulfonic acid. The ether ester (BGFAA) was used to investigate the effect of reactant material ratio n(AA):n(BGF-10), reaction temperature, reaction time, amount of catalyst and amount of polymerization inhibitor on esterification rate. The response surface optimization method optimizes the esterification reaction conditions. The optimum conditions for the synthesis of BGFAA are as follows: reaction temperature 127 ° C, reaction time 5.2 h, n (AA): n (BGF-10) = 1.6:1, polymerization inhibitor dosage 0.6% (accounting for the total mass of the reactants) When the amount of catalyst is 5% (same as above), the esterification rate is as high as 93.23%, and the structure is confirmed by infrared spectroscopy and nuclear magnetic resonance. A new type of heavy oil demulsifier (BGFAA) n was prepared by initiating polymerization of self-made BGFAA and acrylic acid (AA) under the action of azobisisobutyronitrile. The dehydration rate and the oil absorbance of the dewatered wastewater were used as indicators to study the effect of Chen Zhuang. The demulsification dehydration performance of the oil w/o emulsion, when the demulsification temperature is 60 ° C, the demulsification time is 2.5 h, the demulsifier dosage is 500 mg/mL, the dehydration rate is as high as 86.8%, and the oil absorption absorbance of the dewatered sewage is 1.05, which showed that (BGFAA)n had the advantages of high dehydration rate, low oil content of dehydrated sewage and clear water quality.