Tanning wastewater circulating treatment device

The utility model discloses a tannery wastewater circulating treatment device which comprises a treatment box, the bottom of the treatment box inclines downwards towards one side, a plurality of positioning blocks are arranged at the bottom of the treatment box in the inclined direction, a filter screen is arranged above the positioning blocks, a motor is arranged on the side wall, close to the ground, of the treatment box, and the motor is connected with the bottom of the treatment box. The motor is connected with a rotating rod, stirring rods are evenly arranged on the side wall of the rotating rod in a staggered mode, a water outlet pipe is connected to the lower portion of the side wall, close to the ground, of the treatment box, a valve is arranged at the end, close to the treatment box, of the water outlet pipe, a U-shaped pipe is connected to the other end of the water outlet pipe, and the other end of the U-shaped pipe is located on the side wall, away from the motor, of the treatment box. One end, fa