The invention discloses a floater. The floater comprises a floating platform, and the bottom of the floating platform is provided with a plurality of pontoons; every pontoon is composed of a pontoon body and a top cover, wherein the top cover is provided with a first channel and a second channel which communicate the inside and the outside of the pontoon, the opening of the first channel inside the pontoon body is connected with a pipe which extends towards the bottom of the pontoon body, the first channel outside the pontoon body is connected with a water pipe, the second channel outside the pontoon body is connected with an air pipe, the water pipe is connected with a water pump, and the air pipe is connected with an air pump. By means of the structure, when the floater is inclined, the air pump can inflate or pump the pontoons in the low position to drain water, or the water pump can drain water out of the pontoons in the low position or fill water into the pontoons in the high position, so that the floater can restore to a balanced position.