Aluminum-plastic combined bottle cap capable of improving efficiency and reducing cost

The utility model provides an effect-enhancing cost-reducing aluminum plastic combined bottle cap, which comprises an upper cap piece, an outer cap, an inner cap, a conjoined cylinder, an inner plug, an anti-counterfeiting ring and an aluminum cap, the outer cap inner diameter B of the outer cap is in interference fit with the upper cap piece outer diameter A of the upper cap piece, the matching height is 4mm, the outer cap barb C of the outer cap is matched with the inner cap groove D of the inner cap, and the outer cap barb C of the outer cap is matched with the inner cap groove D of the inner plug. An outer cover anti-rotation rib E of the outer cover is matched with an inner cover anti-rotation rib F of the inner cover; the height of the aluminum cover is 42 mm, and the diameter of the punched hole G in the aluminum cover is 28 mm. According to the utility model, the height of the upper cover sheet is increased, the matching height of the upper cover sheet and the outer cover is increased, the upper cover