NOVELTY - Repairing heavy metal chromium in household waste compost by mulberry tree, comprises (i) paving household waste compost, leveling by suppressing, planting mulberry, and repairing chromium after 4 years of growth, (ii) preparing leachate by EDTA and ammonium sulfate, (iii) watering the root of mulberry by EDTA and ammonium sulfate, observing the plant growth, and sampling the plant, (iv) measuring height of plant, dividing into upper and lower part, packing, placing in an oven, drying, crushing sample, and (v) providing plant, crushing, digesting, and determining chromium content.    USE - The method is useful for repairing heavy metal chromium in household waste compost by mulberry tree.    DETAILED DESCRIPTION - Repairing heavy metal chromium in household waste compost by mulberry tree, comprises (i) paving household waste compost that is 20-50 cm in thick, leveling the compost by suppressing as site for repairing engineering, planting mulberry on the engineering site, and repairing the chromium in the household waste compost after 4 years of growth, (ii) preparing leachate by (a) EDTA (50 mmol/l or 100 mmol/l), (b) ammonium sulfate (1 g/l), or (c) EDTA (50-100 mmol/l) and ammonium sulfate (1 g/l) in weight ratio of 1:0.01-0.03, (iii) watering the root of the mulberry by EDTA and ammonium sulfate at a speed of 10-50 ml/minute to assure that the solution is at the root of the plant, observing the plant growth situation, sampling the plant after 20 days, (iv) measuring the height of the plant, dividing into an upper part and a lower part, respectively, then packing the parts by label number, placing in an oven, drying at 80 degrees C until obtaining the constant weight, finally crushing the sample, and (v) providing accurately the plant and crushing into three parts, each of 0.2 g, digesting by nitric acid method through a microwave digester, using a TAS-990 atom absorption spectrophotometer to test the content of chromium in the mulberry. An INDEPENDENT CLAIM is also included for use of the method in enriching household waste compost heavy metal chromium.