A-DMBR autotrophic nitrogen removal double-membrane internal circulation integrated reaction device

The utility model discloses an A-DMBR autotrophic nitrogen removal double-membrane internal circulation integrated reaction device, which relates to the technical field of sewage treatment and comprises a pre-autotrophic nitrogen removal section, a transition section, an enhanced nitrogen removal section, a mud-water separation section and a deep nitrogen removal section which are sequentially connected in series, wherein the pre-autotrophic nitrogen removal section performs nitrosation, short-cut denitrification and endogenous denitrification, the enhanced nitrogen removal section performs anaerobic ammonia oxidation reaction, the deep nitrogen removal section is filled with dominant autotrophic strains and performs deep nitrogen removal on sewage, and an external carbon source is not needed in the whole sewage treatment process; the sewage treated by the deep denitrification section flows back to the autotrophic denitrification section and the enhanced denitrification section through a return pipeline, and