High-concentration ammonia nitrogen efficient treatment device and method

The invention provides a high-concentration ammonia nitrogen efficient treatment device and method. The high-concentration ammonia nitrogen efficient treatment device comprises a flocculent precipitation tank and a multi-stage premixing cylinder; and a through hole is formed in the center of the top of the flocculent precipitation tank. The high-concentration ammonia nitrogen efficient treatment device and method are reasonable in design; when a spiral climbing seat moves downwards, the space in the top of the spiral climbing seat is increased, sewage in the flocculent sedimentation tank is conveyed to the top of a concentration hopper through a lifting pipe and discharged, the purpose of pre-diluting agents is achieved, and meanwhile, part of external air is sucked through an air inflow pipe; and when the spiral climbing seat moves, the space of the top of the spiral climbing seat is reduced, an agent diluent in the multi-stage premixing cylinder is dispersed and input into the flocculent sedimentation tank