Circulating filtration system for high-pressure water jet sand blasting

The utility model discloses a circulating filtration system for high-pressure water jet sand blasting, which comprises an abrasive tank, a collecting hopper, a delivery pump and a spray head, the collecting hopper is connected with a first settling pond, a sewage separation and purification device and a cyclone, and the collecting hopper is communicated with the water inlet end of the first settling pond through a first overflow pipe; the bottom of the first sedimentation tank is communicated with a cyclone through a cyclone separation pump and is used for collecting settled effective abrasive materials, a discharge port of the cyclone is communicated with an abrasive material tank, the cyclone is communicated with the water inlet end of the sewage separation and purification device through a third overflow pipe, and the first sedimentation tank is communicated with the water inlet end of the sewage separation and purification device through a second overflow pipe; the water outlet end of the sewage separatio