Tunnel construction sewage treatment system with floating ash

The utility model provides a tunnel construction sewage treatment system with floating ash, and relates to the technical field of sewage treatment. The device comprises a tank body, a sewage collecting tank, a conditioning tank and an adjusting tank are arranged in the tank body, a high-position floating ash isolating and concentrating device is communicated with the sewage collecting tank and the conditioning tank, the device comprises a concentrating container, a discharge pipe is arranged at the bottom of the concentrating container, and a water outlet pipe communicated with the conditioning tank is arranged on the side of the concentrating container; the top of the central guide cylinder is provided with a mixed flow groove communicated with the central guide cylinder, the inclined tube sedimentation device is communicated with the adjusting tank and the sewage collecting tank, the sewage collecting tank is communicated with the mixed flow groove, and the conditioning tank is communicated with the adjusti