Skid-mounted underground sewage treatment tank

The utility model belongs to the technical field of underground water treatment equipment, and particularly relates to a skid-mounted underground sewage treatment box which comprises a box body with a cavity inside, a chemical feeding opening is formed in the top of the box body, a stirring device is arranged in the box body, a first partition plate, a first inclined plate and a second inclined plate are arranged in the cavity, the first partition plate divides the cavity into a first cavity body and a second cavity body, and the top of the first cavity body is communicated with the top of the second cavity body; a water inlet and a water outlet are formed in the box body, the water inlet is communicated with the first cavity, and the water outlet is communicated with the second cavity. The first partition plate in the skid-mounted underground sewage treatment tank can filter large-particle impurities in sewage, other impurities are prevented from flowing to the water outlet under the matching action of the f