Buffer defoaming water outlet tank

The utility model relates to the technical field of water treatment, in particular to a buffering and defoaming water outlet tank which comprises a first water storage tank, a second water storage tank and a third water storage tank, a siphon water outlet pipe is used for overflowing water below hydraulic jump main flow of the third water storage tank, the bubble amount and water-air mixing of outlet water are reduced, and a follow-up treatment unit is prevented from generating foam. Meanwhile, the two defoaming plates are used for dividing the water outlet pond into three water storage ponds, a plurality of small hollow holes are formed in the plate surfaces of the defoaming plates, the water levels of the first water storage pond, the second water storage pond and the third water storage pond are gradually lowered while impurities are filtered, the water levels are gradually lowered to buffer the falling height of inflow water flow step by step, and therefore water flow impact is reduced; therefore, subsequ