The invention provides a rubbish penetrating fluid treatment method. The rubbish penetrating fluid treatment method comprises flocculent settling treatment, Fenton oxidation treatment and activated carbon adsorption treatment which are performed in sequence. First in the flocculent settling treatment step, by combined use of a decolorizing agent, PAC and PAM, the very good decolorizing effect is achieved, the chromaticity can be reduced by at least two orders of magnitude, and CODs, BODs and heavy metal ions such as arsenite, lead and mercury in water can be removed effectively. Next, organic pollutants difficult to degrade can be removed more effectively through Fenton oxidation under the acidic conditions. Finally, adsorption is performed by utilizing activated carbon. Therefore, the rubbish penetrating fluid treatment method is low in cost, high in effect and simple to operate and saves manpower and material resources. Moreover, the treatment degree is high, the effect is stable, the penetrating fluid chromaticity, CODs, BODs, the heavy metal content and ammonia nitrogen of rubbish treated through the method reach the emission standard.