NOVELTY - Culturing high density composite bacteria for processing papermaking sewage, comprises inoculating Phanerochaete chrysosporium (ATCC 20696) into a high density fermentation basal culture medium, performing fermentation after inoculating Nocardia coral-type bacteria (Nocardia coralline) (ACCC 40100) and copper green Pseudomonas (Pseudomonas aeruginosa) (CGMCC No. 1.239), controlling the temperature at 28-32 degrees C, pH to 5-7.5, and the dissolved oxygen to 1-5 mg, where the total fermentation time is 80-100 hours.    USE - The high density composite bacteria is useful for processing papermaking sewage.    ADVANTAGE - The method: utilizes a culture medium, which is economical (about 20% lysogeny broth LB culture medium); satisfies the requirement of composite microbial inoculums in industrial high density fermentation; comprises controlled conditions, which satisfies the high density of composite microbial inoculum requirement and reduces the investment of the production equipment elements; utilizes three different strains, which are mutually adapted to each other and maintains each activity and ability of degrading pollutants; and is suitable for large scale production.    DETAILED DESCRIPTION - Culturing high density composite bacteria for processing papermaking sewage, comprises inoculating Phanerochaete chrysosporium (ATCC 20696) into a high density fermentation basal culture medium, performing fermentation after inoculating Nocardia coral-type bacteria (Nocardia coralline) (ACCC 40100) and copper green Pseudomonas (Pseudomonas aeruginosa) (CGMCC No. 1.239), controlling the temperature at 28-32 degrees C, pH to 5-7.5, the dissolved oxygen to 1-5 mg, the total volume of basal culture medium to 10-20% of the volume concentration of 50-60% glucose solution during the fed-batch fermentation process, where the total fermentation time is 80-100 hours. The high density fermentation medium comprises: glucose basal culture medium (10-15 g/l), soy peptone (10-15 g/l), sodium dihydrogen phosphate (8-12 g/l), vitamin B1 (2-5 mg/l), biotin (0.1-0.5 mg/l), microelements mother liquor (1-3 ml/l), a fermentation defoamer (0.1 ml/l), phosphoric acid to adjust the pH of the medium to 5.5. The microelement mother liquor comprises cobalt chloride (1 mg/ml), manganese chloride (6 mg/ml), copper chloride (0.6 mg/ml), boric acid (1.2 mg/ml), sodium molybdate dihydrate (1 mg/ml), zinc acetate dihydrate (5.2 mg/ml) and ferric citrate (40 mg/ml).