Underground drilling wastewater collecting, treating and recycling device

The utility model discloses a device for collecting, treating and recycling underground drilling wastewater. The device comprises a sewage filtering water receiving tank, a first-stage filtering sedimentation tank and a second-stage sedimentation water supplementing tank, a water receiving tank water outlet pipe is arranged at one end of the sewage filtering water receiving tank, a precipitation tank water inlet pipe is arranged at one end of the primary filtering precipitation tank, a precipitation tank water outlet pipe is arranged at the other end of the primary filtering precipitation tank, and a water supplementing tank water inlet pipe is arranged at one end of the secondary precipitation water supplementing tank; one end of the water receiving tank water outlet pipe is connected with the settling tank water inlet pipe through a pipeline; one end of the settling tank water outlet pipe is connected with the water supplementing tank water inlet pipe through a pipeline. Sewage at adrilling outlet in the dr