The invention discloses a treatment method capable of effectively purifying black and odorous water in a city. The method successively comprises the following steps: detecting positions of black and odorous water in the city and classifying according to
pollution conditions; mounting a
pollutant intercepting device in a polluted river channel and intercepting the black and odorous water in the river channel; arranging an
oxygenation device in a downstream river channel of the
pollutant intercepting device; mounting artificial aquatic plants in a downstream river channel of the
oxygenation device; and mounting a
sewage conveying pump in an upstream river channel of the
pollutant intercepting device. Through the treatment method, the problems of long
treatment time and low efficiency causedby not separating clear water from the
sewage when the black and odorous water in the city is treated in the prior art are solved; the treatment method capable of effectively purifying the black and odorous water in the city is used for efficiently purifying the black and odorous water in the river channel of the city; the problem that the water in the river channel of the city is black and odorous can be effectively solved; the content of
oxygen dissolved in the
purified water is increased; meanwhile, the
organic matter pollution in the
purified water can be greatly reduced.