Continuous flow fluidized bed biological membrane composite reactor and sewage deep nitrogen and phosphorus removal method

The invention discloses a continuous flow fluidized bed biological membrane composite reactor and a sewage deep nitrogen and phosphorus removal method, and belongs to the technical field of sewage treatment. According to the technical scheme, raw water sequentially passes through an anaerobic zone, an anoxic zone and an aerobic zone to be treated and then enters a sedimentation tank; sludge at the bottom of the sedimentation tank is refluxed to the anoxic zone, and sludge in the anoxic zone is refluxed to the anaerobic zone; returning the sewage in the aerobic zone to the anoxic zone; and suspended fillers are arranged in the anoxic zone and the aerobic zone. The reactor is applied to the aspect of low-carbon-nitrogen-ratio urban domestic sewage treatment, solves the technical problem that an existing reactor cannot realize synchronous implementation of short-cut denitrification, anaerobic ammonia oxidation and denitrifying phosphorus removal at the same time, and can ensure coexistence and synchronous occurr