The utility model discloses an environment-friendly sewage treatment device with a disinfection function. The device comprises a body, a screening net, a treatment box and a purification box. An inletpenetrates through the top of the main body; wherein an inlet is formed in the main body, a sealing cover is tightly attached to the interior of the inlet, the screening net is installed in the mainbody, the main body and the screening net are fastened through a nut, a folding pipe is arranged below the main body, the folding pipe is fixedly connected with the main body, the treatment box is installed below the main body, and the main body is fixedly connected with the treatment box. The environment-friendly sewage treatment device with the disinfection function is provided with the partition plate; when the sewage falls into a waste box in the treatment box from the folding pipe; net-shaped partition plates installed on the two sides of the waste box can prevent impurities in sewage from being further separated, so that screened clean water resources are pumped away by the purification device, and due to the design of the partition plates, when the sewage is pumped away, a certain amount of impurities in the sewage can be separated in the waste box through the partition plates.