Densification method of carbon fiber preform

The invention discloses a carbon fiber preform densification method, and relates to the technical field of carbon fiber material forming processes, and the carbon fiber preform densification method comprises the following steps: carrying out soaking treatment, hot pressing curing and carbonization on a carbon fiber preform to obtain a carbon-carbon plate, and then carrying out liquid phase dipping treatment and carbonization treatment; soaking liquid used in the soaking treatment process comprises resin adhesive composite liquid; the resin adhesive composite liquid is prepared from the following raw materials: resin adhesive, a diluent, filler and carbon powder; an impregnant used in the liquid-phase impregnation treatment process is composed of a resin adhesive and a diluent; the carbon fiber preform is subjected to immersion treatment by adopting a dopamine solution containing iminodiacetic acid before immersion treatment. The densification method provided by the invention has a more excellent densification