Product description: The product obtained after the esterification of 2,5-tetrahydrofurandimethanol and fatty acid can be added to diesel oil as an oil additive to effectively improve the cetane value of diesel oil and lubricity of oil products, with the effect of reducing fuel consumption and emission and protecting the engine. In addition, 2,5-tetrahydrofuran dimethanol fatty acid ester can also be used to prepare plasticizers.