Sewage treatment equipment with multi-stage adsorption function for constructional engineering

The invention discloses sewage treatment equipment with a multi-stage adsorption function for constructional engineering, and the sewage treatment equipment comprises a sedimentation tank, a control case, a water suction pump, a water outlet pipe, a water drainage pipe, a backflow cleaning device, a multi-stage adsorption device and a discharge pipeline, the sedimentation tank is fixedly connected with the water suction pump, and the water suction pump is fixedly connected with the water outlet pipe; the water suction pump is connected with the control case through an electric signal, the water outlet pipe is fixedly connected with the backflow cleaning device, the backflow cleaning device is fixedly connected with the drainage pipe, the backflow cleaning device is connected with the control case through an electric signal, the backflow cleaning device is fixedly connected with the multi-stage adsorption device, and the discharge pipeline is fixedly connected with the multi-stage adsorption device. The invent