Coal bed gas wastewater treatment device

The utility model relates to the technical field of coal-bed gas wastewater treatment, and discloses a coal-bed gas wastewater treatment device which comprises a sedimentation treatment assembly. The liquid inlet pipe is arranged at the liquid inlet end of the sedimentation tank; the liquid outlet pipe is arranged at the liquid outlet end of the sedimentation tank; the exhaust pipe is fixedly connected to the exhaust end of the sedimentation tank; the filter screen is fixedly connected to the interior of the sedimentation tank; an air pressure sensor is arranged in the sedimentation tank, a spraying assembly is arranged in the sedimentation tank, and an air supply assembly is mounted on the outer side wall of the sedimentation tank; by arranging an air pressure sensor, a spraying assembly and an air supplementing assembly, the air pressure sensor can monitor the air pressure in the pool, and when the air pressure in the pool is insufficient, the air supplementing assembly is controlled to work, so that the ai