Coal mine underground sewage water quality softening reuse process treatment system

The invention provides a coal mine underground sewage water quality softening reuse process treatment system. A sewage treatment chamber is arranged in a mining region; a water sand separator, an inner ring sewage cabin and an outer ring sewage cabin are arranged in the sewage treatment chamber; mine inflow is discharged to the water sand separator; after being separated by the water sand separator, the water is conveyed to the inner ring sewage cabin; mine water passes through the inner ring sewage cabin and is then conveyed to the outer ring sewage cabin; a water treatment region comprises water treatment water distribution cabins, a water treatment water collection cabin, a chemical reactor, a primary coagulation reaction pool, a secondary coagulation reaction pool, a magnetic separation machine, a water outlet water cabin and a water treatment control device; the quantity of the water treatment water distribution cabins is matched with the mining regions; the mine water of each mining region is gathered a