Sewage treatment device with large treatment capacity

The utility model belongs to the technical field of sewage treatment equipment, and discloses a sewage treatment device with large treatment capacity, which is characterized in that the lower end of the side surface of an acid liquor adding tank is communicated with the lower end of the side surface of an alkali liquor adding tank; a liquid outlet is formed in the upper end of the side surface of the sewage treatment tank; a spraying head is mounted at the upper end in the sewage treatment tank; a plurality of sludge biochemical tanks are arranged; the aerobic tank is respectively communicated with the liquid outlet ends of the plurality of sludge biochemical tanks through connecting pipelines. According to the utility model, the pH value adjusting device is divided into the acid liquor adding tank and the alkali liquor adding tank which are separately arranged, so that the treatment efficiency of a pH value adjusting procedure can be effectively improved, and the sewage treatment tank is adjusted to feed liq