NOVELTY - The method comprises taking carbon hydrogen and fermented yeast and adding fresh pure fruit residue, crushing the mixture and then putting in sealed jar, weighing fresh pure fruit (30 g), putting the fruit in a bottle of pH 6.0-8.5, adding nitrogen (0.057 g) into the solution to the ratio of 1:30, adding fermenting agent to the solution and mixing them uniformly, culturing the solution in a culture box at 35 degrees C for 4 days and then at 80 degrees C, measuring the pure protein content in each fermentation product of the bottle, and adding ammonium nitrate and calcium hydroxide.    USE - The method is useful for fermenting concentrated juice of solid waste.    ADVANTAGE - The method is capable of anerobically and economically fermenting the concentrated juice of solid waste with high efficiency in a convenient manner.    DETAILED DESCRIPTION - The method comprises taking carbon hydrogen and fermented yeast and adding fresh pure fruit residue, crushing the mixture and then putting in sealed jar, weighing fresh pure fruit (30 g), putting the fruit in a bottle of pH 6.0-8.5, adding nitrogen (0.057 g) into the solution to the ratio of 1:30, adding fermenting agent to the solution and mixing them uniformly, culturing the solution in a culture box at 35 degrees C for 4 days and then at 80 degrees C, measuring the pure protein content in each fermentation product of the bottle, adding ammonium nitrate and calcium hydroxide to adjust the pH value in the bottle, fermenting the raw material to analyze the property of the slag mixture, which is acidified to test the acidification stage in the fermentation process to obtain the mixture of the volatile fatty acids yield to feed the solid content, and providing operating parameter in stable operation such dosing time, crushing the fresh fruit dreg sullage and dry sludge to less than mm and mixing them uniformly, adjusting the pH of the nitrogen compound, diluting the mixture with warm water (8 litre) at 35 degrees C, fermenting material liquid with a concentration of 9% during not adjusting pH, keeping the fermenting temperature at 35 degrees C, measuring every three days ferment liquid volatile fatty acids content and pH, anaerobically digesting the contents and mixing them uniformly, inoculating the surplus sludge using sodium hydroxide solution and then adjusting and maintaining the pH of zymotic fluid to be 6.8-7.2, and testing the total solids, volatile solids, chemical oxygen demand value of the mixture before fermentation and after fermentation, and then recording the gas amount of everytime.