The invention relates to an integrated nitrogen removal and phosphorus removal device for sewage. The device comprises a shell (1); an outer layer vertical barrel (2) is positioned in the shell, and aring-shaped sludge-water separation area (4) is formed between the outer layer vertical barrel (2) and the wall of the shell and is communicated with a water outlet (1d); an inner layer vertical barrel (3) is positioned in the shell; an upper cavity mouth and a lower cavity mouth of a water flow ascending channel (5) arranged in an inner cavity of the inner layer vertical barrel (3) are respectively communicated with the upper part and the lower part of a water flow descending channel (6) arranged at the outer side of the inner layer vertical barrel (3); an inlet of the ring-shaped sludge-water separation area is communicated with the middle lower part of the water flow descending channel; a sludge accumulation area (7) arranged under the inner layer vertical barrel is communicated with awater inlet (1a) and a sludge discharge hole (1b) which are formed in the bottom wall of an inner cavity of the shell; a sludge pump (8a) in a jet aeration device (8) is communicated with an aerator(8b) positioned at the middle lower part of the inner cavity of the inner layer vertical barrel by means of a pipe fitting (8c); a jet device (8d) arranged on the pipe fitting is connected with the lower end of an air inlet pipe (8e) provided with a control valve (8f); the sludge pump is communicated with the sludge accumulation area. The integrated nitrogen removal and phosphorus removal device for the sewage has the characteristics of improving the treatment effect and operating stably.