NOVELTY - Treatment of black-odor river and lake includes pretreating river or lake; performing biofilm treatment; directly plunging Rhodopseudomonas palustris, Lactobacillus and effective microorganisms (EM) microbial agent; performing water ecological restoration and reducing bottom-reducing sludge with Bacillus subtilis, denitrifying bacteria, Rhodopseudomonas palustris, Lactobacillus and EM microbial agent; and maintaining water body with Bacillus subtilis, denitrifying bacteria, Rhodopseudomonas palustris and yeast.    USE - Method for treating black-odor river and lake (claimed).    ADVANTAGE - The method decomposes organic pollution in water, promotes ecological balance, and reduces bottom-reducing sludge by oxidation.    DETAILED DESCRIPTION - Treatment of black-odor river and lake includes: (A) pretreating river or lake by uniformly spreading quick lime at 30 kg/6 acre water level according to area of river bed; and after 3-5 days, splashing 100-120 mesh zeolite powder at 8 kg/6 acre water level; (B) fixing combined fiber filler to a filler frame on downstream outlet of river or lake and sewage outlets along a line; and performing biofilm treatment by impact force of stream to make the microorganism and suspended substance adhere to the filler to form biofilm; (C) activating Rhodopseudomonas palustris under sunshine for 2-3 hours; diluting with water at 6 kg/6 acre water level, Lactobacillus at 2 kg/6 acre water level and effective microorganisms (EM) microbial agent at 4 kg/6 acre water level; uniformly sprinkling in water once a day; and allowing 10-15 days to enter the phase of water ecological restoration and reducing the bottom-reducing sludge by oxidation; (D) adding running water (10 L) in Bacillus subtilis (1 kg) and denitrifying bacteria (1 kg), and activating for 2-3 hours; uniformly sprinkling in the whole drainage area at 1.5 kg/6 acre water level; diluting with water once a day; activating Rhodopseudomonas palustris under sunshine for 2-3 hours; diluting with water at 3 kg/6 acre water level, Lactobacillus at 1 kg/6 acre water level and EM microbial agent at 2 kg/6 acre water level once every two days; and allowing 20-25 days to enter the phase of maintaining and further improving the water environment; and (E) maintaining the water body with Bacillus subtilis and denitrifying bacteria at 1 kg/6 acre water level, Rhodopseudomonas palustris at 2 kg/6 acre water level and yeast at 1.2 kg/6 acre water level once every 3-5 days.