Abstract: A combined bottle cap and magnifying glass, including an outer cap, an inner cap, and a gasket; the inner cap is connected to a bottle body through internal threads; a convex magnifying glass is provided at a center part of the inner cap; the magnifying glass and the inner cap are configured integrally; a first hole corresponding to the magnifying glass is provided on the outer cap; the gasket is provided with a second hole corresponding to the magnifying glass; the outer cap and the inner cap are fastened together; the gasket is arranged between the inner cap and the bottle body; the magnifying glass is fitted to the first hole and the second hole.