The invention discloses a floating body gate and a method of the floating body gate. The floating body gate comprises a limiting block,
bottom water stop rubber, side
water stop rubber, a floating body, a door leaf, a support arm, a support arm cover plate, a hose
pipe, buffering rubber, a support base shaft, a support base, an air delivery
pipe, a dam body and an
air compressor. The floating body gate has the basic functions of a common water gate and further has the two advantages that the water gate flowing width is equal to the
channel width, no
water stop buildings exist above the dam body of a river channel when the gate is opened, and therefore the contradiction between river channel shipping and
flood control is solved well; the floating body gate has the ecological function, no vertical
stairs exist when the floating body gate is closed for
water storage or opened for aerial drainage, so that fishes and river channel objects pass freely, the
noise of
water flow falling does not exist, and natural features of the river channel are kept. The floating body gate is convenient to transport, maintain and install, simple in structure, low in cost and suitable for
water storage or drainage of dams, and has excellent application prospects and obvious technical advantages, and the
water stop structure of the gate is stable and effective for a long time so that frequent replacement can be avoided.