Wastewater circulating treatment system

The invention relates to the technical field of sewage treatment equipment, in particular to a wastewater circulation treatment system which is characterized in that a water inlet and a water outlet are formed in the two ends of a blow-off pipe respectively, an inclined pipe is arranged below the blow-off pipe, a filtering cavity is formed in the inclined pipe, the upper end of the filtering cavity faces the water inlet, and the lower end of the filtering cavity is close to the water outlet; the filtering mechanism comprises a filtering barrel, the filtering barrel is rotatably arranged in the filtering cavity, filtering holes are formed in the peripheral wall of the filtering barrel, and wastewater enters the interior of the blow-off pipe from the water inlet, is filtered by the filtering barrel and then is discharged from the water outlet; the adjusting mechanism is arranged at the lower part of the filtering barrel and drives the filtering barrel to rotate by a preset angle around the axis of the filtering