Convenient-maintenance efficient sewage treatment apparatus

The invention relates to a convenient-maintenance efficient sewage treatment apparatus. The apparatus comprises a plurality of reaction cylinders connected in series through a connecting pipe, the reaction cylinder at the initiating terminal is provided with a water inlet tube for the entrance of sewage, and the reaction cylinder at the tail terminal is provided with a conveying pipe; each of the reaction cylinders is arranged on a platform supported by support columns, one side of the platform is provided with a ladder for a person to climb the platform, one side of each of the water inlet pipe and the connecting pipe is provided with a chemical feed pipe, a horizontal filter tank is arranged below the platform, a plurality of filter plates are arranged in the horizontal filter tank from bottom to top in an interval manner, the lower portion of the horizontal filter tank is provided with a dirt discharge pipe, the dirt discharge pipe is provided with a control valve, the conveying pipe is connected with a bo