The invention provides a multi-protection power distribution network voltage stabilizing device, which comprises a voltage stabilizing box, a fixed cavity, first connecting rods, a base, a first fixedrod, a hoistable shielding cover structure, a slidable adjusting voltage stabilizing seat structure, a detachable branching fixed rod structure, a detachable filter plate structure, a vent hole, a voltage stabilizing block, a voltage stabilizing power distribution device, an arc-shaped plate, a wire through hole, a box cover, an observation sheet, an adsorption block and a lock cylinder, whereinthe fixed cavity is arranged in the voltage stabilizing box; and the lower ends of the first connecting rods are connected to the four corners of the upper end of the base through bolts respectively.Through arrangement of a shielding cover, a second connecting rod, a flow guide plate and the voltage stabilizing box, rain and snow falling at the upper end of the voltage stabilizing box can flow into the flow guide plate through the shielding cover in the working process, then the rain and snow are discharged to the left side and the right side of the voltage stabilizing box through the flow guide plate, and shielding in the using process is facilitated.