Efficient dissolved air flotation machine for sewage treatment

The utility model relates to the technical field of sewage treatment, in particular to an efficient dissolved air flotation machine for sewage treatment, which comprises an air flotation machine, an input pipe is fixedly arranged on the upper side of one end of the air flotation machine, an output pipe is fixedly arranged on the lower side of the other end of the air flotation machine, and a sealing groove is formed in the upper end of the air flotation machine. A fixed block is fixedly arranged on the portion, on the upper side of the output pipe, of the air flotation machine, a mounting groove is formed in the fixed block, an electric telescopic rod is fixedly mounted in the mounting groove, and when particles in the air flotation machine need to be cleaned, the electric telescopic rod is started to drive a sealing cover plate to move upwards and meanwhile drive a movable frame to move out of the air flotation machine; the particles are all brought out of the air flotation machine under the action of the fi