NOVELTY - Preparing bacterial enzyme compound, comprises (i) preparing a Bacillus subtilis powder; (ii) preparing seed culture of Rhodopseudomonas palustris strain, and culturing, fermenting culture, sterilizing, cooling, inoculating and anaerobically illuminating; (iii) collecting, and culturing an indigenous bacteria; (iv) domesticating, and pouring the bacteria and a compound culture medium, adding Bacillus subtilis powder, and testing different loads and organic substance concentrations; and (v) culturing domesticated working bacterial enzyme, to obtain the product.    USE - The bacterial enzyme compound is useful for treating sewage and sludge.    ADVANTAGE - The compound obtained from the method has high adaptability in any sewage environment, and decomposes bacteria in the local environment with guide and synergistic effects.    DETAILED DESCRIPTION - Preparing bacterial enzyme compound, comprises (i) preparing a Bacillus subtilis powder; (ii) preparing seed culture of Rhodopseudomonas palustris strain with an inoculation amount of 3%, then culturing for 7-10 days at 26-30 degrees C to obtain a photosynthetic bacterial solution, then performing fermentation culture by mixing a fermentation culture medium with sewage or sludge to-be-separated and occupying 5-10% of the total weight, and adjusting the pH value to 6.5-7.5, then sterilizing for 20 minutes at 121 degrees C, cooling, and then inoculating in the photosynthetic inoculum (1-5%), then culturing for 5-7 days under an anaerobic illumination at 28-30 degrees C for changing the color of the culture solution from colorless to red, and obtaining a deep red photosynthetic bacterial solution; (iii) collecting and culturing an indigenous bacteria by (iiia) sampling from the sewage or sludge to-be-treated, and placing in a sterile vessel, (iiib) culturing the sewage or sludge to-be-treated, and a micro-organism culture medium in the weight ratio of 97:3-9:1 for 5-10 days with a pH of 6.5-7.5 at 23-33 degrees C, and (iiic) adding the indigenous bacteria obtained in the step (iiib) in the culture medium according to an inoculation amount of 10%, and culturing to obtain the indigenous bacteria; (iv) domesticating by gradually increasing the sewage or sludge concentration in the culture solution, and pouring the indigenous bacteria and a compound culture medium based on different sludge loads, and simultaneously adding the Bacillus subtilis powder occupying 0.1-0.4% of the total weight, and the photosynthetic bacterial solution occupying 1-3% of the total weight, and performing tests of different loads and different organic substance concentrations, then determining the optimal parameters and repeating thrice to obtain the domesticating product; and (v) adding the domesticated working bacterial enzyme and the compound culture medium according to the optimal parameters of the domestication culture, then simultaneously adding the Bacillus subtilis powder occupying 0.1-0.4% of the total weight and the photosynthetic bacteria solution occupying 1-3% of the total weight, culturing for 5-7 days at 23-32 degrees C to obtain a domesticated working product.