Rapid forming method and forming mechanism for automobile steering wheel cover

The invention discloses a rapid forming method and forming mechanism for an automobile steering wheel cover. The forming method comprises the steps of oil absorption, keeping, oil recharging and oil drainage. The forming mechanism comprises a lower die base, a main oil cylinder, an oil pool and a self-suction valve, wherein a plunger of the main oil cylinder is detachably connected with the bottom of the lower die base, the lower die base upwards punches an automobile steering wheel covering sleeve and an upper die base, the bottom of an upper through pipe is connected with a self-suction valve, the self-suction valve comprises a driver, a valve body and a valve element, a main oil way and an auxiliary oil way are arranged in the valve body, the two ends of the main oil way are connected with the upper through pipe and the lower through pipe, the valve element is in a rod shape, the center of the valve element is thinner than the two ends, the top of the valve element can be inserted into and block the auxili