Circulating purification device for water pollution treatment

The utility model discloses a circulating purification device for water pollution treatment, which belongs to the technical field of water pollution treatment and comprises a purification main body, an outer frame is fixedly mounted on the outer side of the purification main body, a motor is fixedly mounted at the upper end of the outer frame, and an outlet is formed between a deposition tank and the outer side of the purification main body. According to the device, when the internal weight of a purification bin is increased, the purification bin descends and then pushes a threaded column to descend, a bevel gear rotates through downward movement of the threaded column, a gentle slope trapezoidal plate is driven to rotate through rotation of the bevel gear, and then a deposition plate on a positioning column moves to the lower side of the gentle slope trapezoidal plate; at the moment, due to the weight of the metal objects accumulated on the deposition plate, the deposition plate inclines rightwards, and then