A three-piece composite spinning wheel hub, which is characterized by comprising: a rim front piece, one end face of the rim front piece has a rim front piece connecting ring; a rim rear piece, one end face of the rim back piece has a Rim rear piece connecting ring; spoke middle piece, said spoke middle piece has a disc structure, and one side of said spoke middle piece is provided with a first assembly surface for interference fit with said rim front piece connecting ring, The other side is provided with a second assembly surface for interference fit with the connecting ring of the rear rim, and the edge of the disc structure forms a "convex" shape with the first assembly surface and the second assembly surface Structure; the rim front piece and the spoke middle piece are connected and fixed by an interference fit between the rim front piece connecting ring and the first assembly surface, the rim rear piece and the spoke middle piece pass through the rim The sheet connecting ring and the second assembling surface are connected and fixed in an interference fit to form a three-piece composite spinning wheel hub; wherein the front rim piece and the rear rim piece are respectively made by spinning circular plates.