A typical accident in the winter is conductor galloping with ice accretion, which is the main reason for tower breakage and other mechanical damage. Considering the giant and complicated structure of the power transmission tower and the random and irregular occurrence of the conductor galloping, it is difficult to study the tower’s galloping-endurance character with measurements on a real transmission line. Using a 500 kV tower with damage caused by galloping as a prototype, a laboratory model of a tower section and ice-accreted conductor is constructed based on the similarity theory of structure-modeling. In addition to the vibration-exciting device to simulate galloping and the signal sampling system, one experimental system in particular is formulated to study the tower response to galloping. The series tests developed on the experimental system are used to find the effect of the magnitude and frequency of conductor galloping on tower response, proving that the experimental system can be confirmed with the simulation of tower-galloping response and relative galloping-endurance analysis