It has a significant cleaning and cleaning effect, and can also significantly improve the antioxidant, rust and demulsification properties of diesel, reduce the damage caused by inferior diesel to the engine oil circuit, oil pump and fuel injectors, and meet the requirements of international high clean diesel standards when used at low doses. This product can be used as the main agent in the formulation of diesel detergent, and can also be used in refineries and gas stations to directly add refined oil to the storage, transportation and irrigation of refined oil products, and is used as a diesel fuel improver, which is a wise choice to improve the quality of diesel.