Sewer sewage purifying device for sewage treatment

The invention aims to solve the problem that an existing device inconveniently purifies sewage in a sewer, and discloses a sewer sewage purifying device for sewage treatment. The sewer sewage purifying device for sewage treatment comprises stirring rods, handles, supporting racks, connecting plates, telescopic air bags, first through holes, mounting rods, push blocks, rotating plates, motors, pushplates, fastening screws, sliding plates, guide rods, first spiral springs, spiral blades, sleeves, positioning rods, second spiral springs, supporting rods, roller devices, second through holes anda connecting barrel. By arrangement of the motors, the telescopic air bags are conveniently extruded repeatedly, by extrusion to the telescopic air bags, sewage is conveniently filtered by the first through holes, impurities are filtered into the telescopic air bags, purification of the sewage is finished favorably, requirements of the society are met, and thus, the sewer sewage purifying device for sewage treatment is wor