The invention provides a brand new preparation method of ciprofibrate. The method is characterized in that the method comprises the following steps: decarboxylating cheap and easily-available p-hydroxybenzaldehyde as a raw material, carrying out hydroxy group protection, cyclizing, deprotecting, and carrying out a Bargellini reaction to prepare ciprofibrate. Compared with traditional methods, the method provided by the invention has the advantages of simple operation, mild and easily-controlled conditions, post-treatment convenience, environmental protection and high yield, has a high safety because of the avoiding of the use of a large amount of peroxy acid or hydrogen peroxide, and is a brand new environmentally-friendly method suitable for the industrial synthesis of ciprofibrate.