The utility model discloses a coal seam gas well reverse circulation liquid sled dress treatment facility, this equipment includes flushing fluid processing system, power supply system and water supply system, flushing fluid processing system is provided with filtration jar, buffer tank, level filtering ware, secondary filter, punchhole, well -flushing centrifugal pump, flowmeter, pressure gauge, needle valve, the import of output liquid, working shaft import and the drain that is fixed in sled dress base, water supply system is provided with water supply centrifugal pump and resource of water supply with the hose connection, power supply system is provided with the generating set and the variable frequency control cabinet of independent sled dress. Its advantage is: the cleaning that can guarantee to filter the back flushing fluid, reinforcing backwash effect, possess from cleaning function, make things convenient for the buggy in later stage to wash, filter the directional processing of jar interior buggy accessible drain, avoid causing environmental pollution, reduced the whole size and the gravity of equipment, the convenience is hoisted and the transportation, flushing fluid after the processing can use by the recycle, but water economy resource and reduce backwash well cost.