Preparation method of variable-thickness layer-to-layer connection structure fabric

The invention discloses a preparation method of a variable-thickness layer-to-layer connection structure fabric. The method includes the following steps: yarns at an inner layer and at an outer layer are alternated firstly through the relative movement and the mutual movement of two adjacent columns of yarns, and then the yarns moved to the surface are thinned or thickened. According to the preparation method of the variable-thickness layer-to-layer connection structure fabric, a novel layer-to-layer connection structure is achieved through the movement of the yarns on the basis of layer-to-layer connection structure braiding equipment, the connection depth of layers of the novel layer-to-layer connection structure fabric is larger, the delamination capability is stronger, meanwhile, the alternated movement of the yarns facilitates the operation of thinning the yarns on the surface of the fabric, the size of a unit cell is changed by not changing the number of unit cells in the fabric so as to change the thickness of the fabric and prepare a cone-shaped fabric, a plate-like variable-thickness composite preform is prepared by thinning the yarns from the two sides, and a cone is prepared by thinning the yarns from one side.