Assembled techniques of flocculation-hydrolyzation-oxydation with Fenton reagent is used for jean-washing wastewater treatment. After pretreated by grilles and preliminary tank，the wastewater is homogenized in regulating pond. Together with the flocculation (PFS) employed ahead the sewage pump，the wastewater is lifted to inclined-board settling basin，then the sludge is pumped into sludge thickener，and the liquid flows into flocculation-hydrolyzation pond (with half-flexible stuffing materials hanged) for anaerobic treatment. The outflow then is oxygenated by Fenton reagent and filtered through fast-filtering tank. The result shows that the techniques，which have the advantages of excellent treatment effect，low cost，easy-run and stable water quality capable of recycle，is an effective method for jean-washing wastewater treatment.