The invention discloses a high-thickness lock cylinder three-dimensional woven fabric and a weaving method thereof. The woven fabric comprises N warp layers and N+1 weft layers; the warp layers and the weft layers are perpendicularly and alternately arranged; warp in the warp layer is parallel and is straightened to be arranged, weft in the weft layer is parallel and is straightened to be arranged, and the warp and the weft are mutually perpendicular and bound by stitching yarn; the binding yarn is in a Y-shaped state in the thickness direction of the fabric, and a lock cylinder structure is obtained. The method comprises the steps that the first set of binding yarn with the identical motion law is increased, the weft is introduced, the warp in each layer is sequentially improved, all the warp of N layers is lifted up, one-time beating-up is completed every time the weft is introduced; then, the first set of binding yarn is decreased, meanwhile, the second set of binding yarn is increased, the weft is introduced, each layer of warp is decreased sequentially, and N layers of warp are completely decreased; the steps are executed repeatedly, and the woven fabric is obtained. The three-dimensional woven fabric has multiple layers, high thickness and high density.