Sewage treatment device capable of realizing solid-liquid separation

The sewage treatment device comprises a case body and a separation cavity, the upper end of the case body is provided with a sewage injection port, the right side of the sewage injection port is provided with a water injection port, the separation cavity is arranged at the lower end of the water injection port, the left side of a filter plate is connected with a rotating shaft, and the left side of the filter plate is connected with a water outlet. A rotating shaft is arranged in the separation cavity, the rotating shaft is rotatably connected with a filter plate, a filter screen is arranged on the inner side of the filter plate, a drain pipe is arranged at the lower end of the filter screen, a movable door is mounted on the left side of the separation cavity, and a discharge port is formed in the left side of the movable door. The separation cavity can be driven to move up and down by starting the first aerostatic press and the second aerostatic press which are arranged below the separation cavity, impuritie