▎ 摘　　要

NOVELTY - The method involves carrying out magnetic stirring process, after graphene oxide, tris-hydrochloric acid, polyvinyl alcohol and water are mixed to prepare a graphene oxide suspension. The ethanol is added to the stirred mixture. The graphene oxide suspension is carried out. The one-way quick freezing and drying are carried out. The inert gas atmosphere is sintered after drying completion of drying process. The sintered product is put into the polymer aqueous solution. The soaked product is pressed and dried to obtain a graphene composite material. The ratio of the sintering and polymer water solution is 0.05g: 50ml. USE - Preparation method of graphene composite material used in preparation process of pressure sensor (all claimed). ADVANTAGE - The method enables preparation of graphene composite material with high-sensitivity, pressure-changing and graphene-changing effects. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical view illustrating the variation of the resistor under different pressures. (Drawing includes non-English language text)