Dynamic problem of a kind of column-type hanging truss structural system having pseudo-elastic shape memory alloy (SMA) bracing wires is dealt with in this study.Adequacy of the developed dynamic model is demonstrated from the viewpoint of energy conservation.In the case that the sectional area values of the bracing wire members are small,it is close to the situation that there are no braces.Under the configuration of hanging type,due to the effect of gravitational force,this kind of structure is stable and it can isolate an apparatus installed at its peripheral end from the influence of vibration of the support ceiling.