Method for restoring style and appearance of granitic plaster veneer

The invention discloses a granitic plaster facing style and appearance restoration method, and belongs to the technical field of historical building protection and repair. The method comprises the following steps: collecting geometric data of a granitic plaster veneer, and drawing a CAD drawing; a sample image of the granitic plaster veneer is collected, and material and proportion information is analyzed; manufacturing a facing sample, comparing the facing sample with the original facing, and then determining final material and proportion information; a mold is manufactured according to the drawing, and a mold is prepared according to the mold; a mixture is prepared according to the final material and proportion information, a facing structure is manufactured through a mold, and the granitic plaster facing is obtained through water washing after demolding; and the prepared granitic plaster veneer is transported and installed. The granitic plaster veneer prepared through the method can be matched with an orig