A preparing method of ethyl 2-cyano-3,3-diphenylacrylate

A preparing method of ethyl 2-cyano-3,3-diphenylacrylate is disclosed. The method includes following steps of: adding cyclohexane and benzophenone into a reactor, after the benzophenone is fully dissolved, heating to 102-104 DEG C, maintaining the temperature, adding sodium bicarbonate as a catalyst, adding ethyl cyanoacetate into a dropwise-adding storage tank, slowly adding the ethyl cyanoacetate dropwise into the reactor, reacting for 16-18 h, and separating produced water timely during the reaction process, so that a product of the ethyl 2-cyano-3,3-diphenylacrylate is obtained after the reaction is completed. The method is simple in process and easily controllable in operation conditions, overcomes the problems, namely low product yields and severe raw material waste of production methods at present, largely increases the product yield, reduces the production cost, and largely increases enterprise benefit.