Composite intake and exhaust valve

The utility model discloses a composite intake and exhaust valve which comprises an exhaust valve body, an exhaust valve cover, a micro exhaust device, a movable valve core, a floating ball and a ballbasket, a valve body cavity is formed in the exhaust valve body, and the ball basket is arranged in the valve body cavity. The ball basket comprises a guide straight pipe and a drainage bottom surface, the guide straight pipe is connected with the drainage bottom surface and the exhaust valve body, and through holes are formed in the guide straight pipe and the drainage bottom surface; the exhaust valve cover is arranged on the side, away from the ground, of the exhaust valve body. The exhaust valve cover and the movable valve element are matched to form a sealing pair. The trace exhaust device is arranged on the movable valve core; and the floating ball is movably arranged in the guide straight pipe and is movably arranged below the movable valve core. According to the technical scheme,the movable valve element