Indoor pipeline drainage system for storied building

The utility model relates to a pipeline drainage system, and particularly relates to an indoor pipeline drainage system for a storied building. The technical scheme is that the indoor pipeline drainage system comprises a vertical drainage pipe, a horizontal drainage pipe, a hold well, an indoor drainage pipe, a squatting pan drainage pipe, a floor drain drainage pipe, and a hand basin drainage pipe, wherein the vertical drainage pipe is connected with the hold well through the horizontal drainage pipe; one end of the indoor drainage pipe is communicated with the vertical drainage pipe; the squatting pan drainage pipe, the floor drain drainage pipe and the hand basin drainage pipe are respectively connected with the indoor drainage pipe; the other end of the indoor drainage pipe is connected with a horizontal pipe and a vertical pipe through an elbow connecting pipe; the vertical pipe is connected with the hold well; and the height of the horizontal pipe is smaller than those of inlets of the squatting pan dra