The present invention relates to a series of analogues having a structure of a natural product Pyripyropene A as represented by formula I, and preparation method and use thereof, and particularly relates to analogues of the natural product Pyripyropene A, preparation method and application thereof in treating cardiovascular diseases such as atherosclerosis, etc. as an inhibitor of an acyl-coenzyme A: cholesterol acyltransferase 2 (ACAT2).