NOVELTY - Treatment method of piggery methane fluid wastewater includes preparing composite photosynthetic bacteria by adding budding bacteria and Rhodobacter capsulatus into erlenmeyer flask respectively, inoculating with activated liquid medium, and standing to obtain budding bacteria liquid culture medium and Rhodobacter capsulatus liquid culture medium; and adding into transparent culture vessel, adding composite photosynthetic bacteria, stirring, inoculating, and standing; and adding into piggery methane, and treating.    USE - Method for treatment of piggery methane fluid wastewater (claimed).    ADVANTAGE - The method utilizes composite bacteria which increases chemical oxygen demand removal efficiency of more than 20% compared to using single bacterium, increases growth rates of two types of photosynthetic bacteria in piggery methane fluid, increases utilization rate of photosynthetic bacteria for organic matter, ammonia and phosphorus in piggery methane fluid, comprehensively and directly utilizes large number of output bacteria which achieves removal of pollutants, and has good treatment effect and increased purification efficiency.    DETAILED DESCRIPTION - Treatment method of piggery methane fluid wastewater comprises (A) preparing composite photosynthetic bacteria comprising adding budding bacteria and Rhodobacter capsulatus into 100 mL erlenmeyer flask respectively, inoculating with activated liquid medium at pH of 6.8-8 and at light intensity of 2000-5000 lux, and standing to 28-32 degrees C for 3-4 days to obtain budding bacteria liquid culture medium and Rhodobacter capsulatus liquid culture medium; and adding transparent culture vessel, such as polyethylene bag or transparent bottle with two culture mediums, adding composite photosynthetic bacteria, stirring, inoculating to pH of 6.8-7 and at light intensity of 2000-5000 lux, and standing to 28-32 degrees C for 4-5 days; and (B) adding into piggery methane fluid at volume ratio of 1:5-1:10, and treating to 25-35 degrees C and at light intensity of 2000-5000 lux.