The invention discloses a carbon fiber composite mold surface forming property screening method. The method comprises the specific steps that firstly, a numerical control machine tool is adopted for machining a forming surface on a female die; secondly, die prepreg is adopted to be laid on the surface of the female die in the first step, and after the prepreg is laid, according to the curing system of the die prepreg resin system, curing forming of a composite die in a hot pressing tank or oven can be finished; thirdly, the composite die is separated out of the female die, and is subjected tocold and hot circulation treatment, and point cloud information of the product profile is obtained, and is transmitted to a numerical control grinding and polishing machining system; fourthly, a high-spot material is removed, and after the profile precision is converge to the die profile precision threshold, a polishing device is adopted for carrying out circular polishing according to the profilefinal precision needs; and fifthly, a three-dimensional measuring method is adopted for carrying out comprehensive evaluation on the forming surface property. The comprehensive evaluation of the surface property after profile precision is improved through the grinding and polishing machining means of the carbon fiber composite die is achieved.