Preparation method and application of slow-release material for treating water pollution

The invention discloses a preparation method and application of a slow-release material for treating water pollution, and the preparation method comprises the following steps: adding chitosan into water of which the pH is adjusted to 4-5 by acetic acid, and stirring the mixture until the chitosan is completely dissolved; rapidly adding a sodium carbonate solution into the chitosan by 40-60 mL of the sodium carbonate solution to each gram of chitosan, and fully stirring the mixture to obtain a chitosan solution; adding a functional microbial agent for embedding; adjusting the pH value of the solution to 6.5-7.5 by using acetic acid, separating out precipitates, and fully stirring and standing the precipitate, and filtering and drying the mixture to obtain the slow-release material. The slow-release material embedding microbial inoculum is used for treating sewage, and can achieve the effects of purifying water for a long time, effectively reducing the contents of organic matters and ammonia nitrogen in water,