Integrated sewage treatment method

The invention discloses an integrated sewage treatment method. The method comprises the following steps: S1, continuously feeding raw water into an anoxic tank, an anaerobic tank and an aerobic tank from a water inlet for reaction; s2, starting an RAS pump, mixing equipment and an aeration system in the second reaction tank, and pumping sludge accumulated when the second reaction tank is used as a decanting tank in the previous operation cycle back to the anoxic tank; s3, shutting down the RAS pump in the second reaction tank, and carrying out intermittent reaction; s4, aerating and mixing equipment in the second reaction tank is shut down, and static precipitation is carried out; s5, continuously replacing and discharging supernate generated in the static precipitation stage of the last cycle by the mixed liquid continuously flowing into the first reaction tank from the aerobic tank; s6, exchanging functions of the second reaction tank and the first reaction tank, and periodically repeating the steps; throug