The invention relates the mixing epoxide aliphatic acid monoesters, comprising the following steps: without solvent, mixing alcohol and rapeseed oil, carrying out alcoholysis reaction with catalyst, getting mixing unsaturated aliphatic acid monoesters, then carrying out epoxidised reaction with epoxidation agent, and getting the mixing epoxide aliphatic acid monoesters. The invention has the advantages of without solvent, environmental protection, overcoming the defect that it is hard to separate the unsaturated aliphatic acid monoesters from water, and improving the conversion rate of raw material. The product with the method has the advantages of light color and luster, stable quality, reducing by-products and improving the production efficiency. The invention uses different polyatomic alcohols and mixture to prepare the mixing unsaturated aliphatic acid monoesters which have different properties. The invention uses the mixing unsaturated aliphatic acid monoesters as raw material, so it is easy to prepare the mixing unsaturated aliphatic acid monoesters which have different indexes.