The invention relates to an environmentally-friendly energy-saving wastewater pumping drainage pump, and belongs to wastewater treating equipment. An upper magnet and a lower magnet are arranged outside a wastewater pumping casing, a protective hood is fixed on the wastewater pumping casing, an annular floating cavity is fixed under the protective hood, and a residue filtering machine is fixed at a water inlet in the lower end of the wastewater pumping casing; a wastewater drainage valve is fixed in a center hole of the wastewater pumping casing, a magnetized piston is arranged in the wastewater pumping casing, a water through sealing plate seals a waterwater inlet passage of a water inlet cavity, and a sealing ball or a sealing cone seals a wastewater inlet passage of an extruding cavity; a fixing plug is fixed in a plug hole in the magnetized piston, and the sealing ball or the sealing cone is mounted in an internal cone hole of the magnetized piston. The environmentally-friendly energy-saving wastewater pumping drainage pump is compact in structure, low in vibration, high in utilization rate of electrical energy, high in power, and suitable for pumping wastewater in a wastewater well, pumping wastewater in a wastewater sedimentation pond, and pumping wastewater in a water tower; when pumping drainage is performed on the wastewater, dirt and mud do not enter the wastewater pump, and the environmentally-friendly energy-saving wastewater pumping drainage pump can transfer wastewater by allowing the wastewater to flow automatically, so that electric energy is saved.