The invention discloses a power distribution network structure capable of satisfying N-1 load non-losing under a 35-220kV power grid overhaul mode. The power distribution network structure comprises a first 220kV power supply, a second 220kV power supply, a first three-phase transformer, a second three-phase transformer, a first section switch and a second section switch, wherein the input end of the first three-phase transformer is connected with the output end of the first 220kV power supply; the first output end of the first three-phase transformer is connected to a 110kV bus while the second output end of the first three-phase transformer is connected to a 35kV bus; the input end of the second three-phase transformer is connected with the output end of the second 220kV power supply; the first output end of the second three-phase transformer is connected to the 110kV bus while the second output end of the second three-phase transformer is connected to the 35kV bus; the first section switch is arranged between the first output end of the first three-phase transformer and the first output end of the second three-phase transformer on the 110kV bus; and the second section switch is arranged between the second output end of the first three-phase transformer and the second output end of the second three-phase transformer on the 35kV bus. The power distribution network structure has the advantage of satisfying circuit N-1 load non-losing under the overhaul mode, and main transformer N-1 load non-losing under the overhaul mode.