Large-scale conductor galloping of transmission lines occurred three times in Henan province from November 2009 to March 2010 caused by atrocious weather including gale, freezing rain and snow . Among them, the galloping of Henan 500 kV transmission lines caused such faults as line trip, tower cross arm damage, bolt desquamate, jumper drainage line damage, insulator and spacer damage and damper slip, which badly affected the normal operation of Henan power grid impact. The paper makes a statistical analysis of the galloping damages in terms of the extent and features and analyzes the galloping genesis and the causes of grid damages. Based on the anti-galloping experience of Henan power grid, some anti-galloping measures are proposed according to the galloping damage characteristics of transmission lines.