An ester antiwear agent was synthesized with oleic acid and glycerol as raw materials,and its molecular structure was characterized by infrared spectroscopy.The main quality performance of diesel fuel with ester antiwear agent was evaluated by demulsification test,antiwear test and compatibility test.The results show that the acid value of the ester abrasive is very low,and the change of diesel acidity caused by ester antiwear agent is very small,which will not lead to diesel acidity exceeding the standard.Due to the hydrophilic and lipophilic groups in the ester antiwear agent,its demulsification resistance to diesel oil is not as good as that of acid antiwear agent,so the demulsifier should be added to improve the demulsification resistance of diesel oil.The diesel oil with ester antiwear agent shows good antiwear performance,the abrasion diameter conforms to the standard,the abrasion is small,the abrasion and the abrasion boundary are simple.The ester antiwear agent has good compatibility with coagulants,hexadecane value modifier and antistatic agent,and has no effect on the main performance indexes of basic diesel oil.