Efficient denitrification sewage treatment method

The invention relates to the field of sewage treatment, and particularly discloses an efficient denitrification sewage treatment method which comprises the following steps: introducing sewage in a raw water tank into a hydrolysis acidification tank, an aerobic tank and an aerobic sedimentation tank which are connected in sequence; sludge in the aerobic sedimentation tank respectively flows back to the aerobic tank and the hydrolysis acidification tank; the hydrolytic acidification tank contains hydrolytic acidification bacteria with the concentration not lower than 2g/L, and the aerobic tank contains bacteria with aerobic denitrification-heterotrophic nitrification functions and activated sludge with a nitrification function; the bacteria with the aerobic denitrification-heterotrophic nitrification function comprise at least one of pseudomonas fluorescens, pseudomonas aeruginosa, alcaligenes, arthrobacter and paracoccus denitrificans. According to the sewage treatment method, the denitrification efficiency ca