Modularized treatment system for underground water polluted by organic matters

The modularized treatment system for the underground water polluted by the organic matters comprises a first cabinet, a second cabinet and a third cabinet, an oxygenolysis device is arranged in the first cabinet, and the oxygenolysis device is used for degrading macromolecular organic matters in sewage to form inorganic micromolecular substances; the second cabinet is internally provided with precipitation equipment, the precipitation equipment is used for carrying out physicochemical treatment on the sewage subjected to oxygenolysis treatment so as to enable inorganic small molecular substances in the sewage to form precipitates, and the precipitation equipment is used for being connected with oxygenolysis equipment; the third cabinet is internally provided with weight reduction equipment, the weight reduction equipment is used for carrying out filter pressing treatment on precipitates formed in the sewage, and the weight reduction equipment is used for being connected with the precipitation equipment. Accor