This paper is about studying on reducing the power frequency electric field producing by the high tension transmission line near the buildings open field.Using a 220 kV high level line and the high building near it

the paper studies on the shielding effect of setting up balcony shielded wire.First

this paper surveys the electric pollution of the building near the high tension transmission line by site investigation and simulation analysis. Then

after making the balcony shielded wire model by simulation software

this paper analyses the influence of shielding effect when changing wire diameter and clearance of shielded wire

horizontal distance and vertical distance of the shielded wire with balcony and integrity of the shielded wire.Studies have shown that setting up balcony shielded wire can effectively reduce the power frequency electric field of balcony

which dropped to less than 30% of the original.At the same time

using of the integrated shielded wire which has greater wire diameter

smaller clearance

farther from the balcony edge of the horizontal distance and vertical distance works best.