Manufacturing method of special-shaped airplane frame stand column

The invention discloses a manufacturing method of a special-shaped airplane frame stand column in the field of airplanes, which comprises the following steps: 1) preparation work: preparing prepreg according to requirements, and cleaning the surface of an inner mold; 2) paving an inner mold, and bonding a silica gel sheet on the surface of the inner mold at a position corresponding to a non-thickened area in the stand column of the rack; laying prepreg at the position, corresponding to the thickening area in the stand column of the rack, on the surface of the inner mold until the thickness of the prepreg is consistent with that of the silica gel sheet, and then carrying out whole laying in the thickening area and the non-thickening area to obtain a preformed part; (3) the outer mold is closed, specifically, the preformed part is placed in a lower cover plate of the outer mold, two pressing rods are placed on the two sides of the preformed part respectively, a gasket is placed between an upper cover plate and