Using the commercial software of ANSYS, the dynamic analysis of threetower doublespan test model and its prototype is conducted, and their transient responses under various iceshedding conditions are compared. It is shown that not only the characteristic parameters of iceshedding responses are all similar, but also the whole timehistory curves fit well. Therefore, the test results of the model are valid, and they reflect the dynamic properties of the prototype. The study and the found in this paper not merely verify the accuracy of the test model, but also provide theoretical guidance for the model construction and the model experiment of iceshedding.