During the compact 500 kV 6-bundled conductor stringing under tension,sub-conductors twisting often occurs when span becomes large.The traditional solution that adds conductor separators within the span is not suitable in mountain regions.A new method to regulate tensions in sub-conductors was successfully applied to 500 kV Sheng-Shi line.The 6 sub-conductors are at high and low levels regularly to prevent the conductor from twisting.The new method reduces installation tools and labor and solves the conductor twisting problem in mountain regions.