Integral loose filament forming method for skin reinforced structure composite end frame

The invention provides an integral loose wire forming method for a skin reinforced structure composite end frame. The integral loose wire forming method comprises the steps that a mold and a filling tool are designed; forming a trapezoidal shearing opening in the prepreg of the end frame; layer reduction treatment is conducted on the 0-degree laying layer yarn scattering area of the end frame reinforcing area; paving prepreg at the reinforcing area of the end frame of the mold; auxiliary materials are sequentially placed on the surface of the prepreg, and a vacuum bag is used for bag making, vacuumizing and pre-compaction treatment; paving the prepreg on the mold until the paving is completed; rib forming is carried out in a rib groove of the mold; after the number of layers of the ribs reaches 1/2 of the total number, the tail ends of the ribs are evenly scattered into a layer reduction area of an end frame reinforcing area; a filling tool is placed in the rib groove, a bag is made, and the ribs and the end