Buried combined fast-assembly sewage treatment equipment system

The invention relates to a buried combined fast-assembly sewage treatment equipment system. The system comprises a grating channel, a grit chamber and sludge tank combined tank, an adjusting tank tank, horizontal tank type treatment equipment, a fan and electric control system combined unit and a dosing and ultraviolet sterilizer integrated unit which are arranged in sequence, the horizontal tank type treatment equipment comprises an anoxic tank, an anaerobic tank, an aerobic tank, a middle tank and a sedimentation tank which are arranged in a tank body and are sequentially communicated, suspended ball filler is arranged in the anoxic tank and the anaerobic tank, polyurethane filler is arranged in the aerobic tank, an aerator is arranged at the bottom of the aerobic tank, and the middle tank is communicated with the middle tank. A nitrification liquid return pipe connected with the anoxic tank and a pipeline mixer connected with the sedimentation tank are arranged in the middle tank; an inclined tube filler p