In magnetostrictive actuators there exits a nonlinear property, that is the magnetostrictive hysteresis which will have influence in the active vibration control. So it is important of modeling of the magnetostrictive hysteresis. In this paper, a new method, which is based on the Tree-Structured fuzzy inference system, is proposed for modeling the magnetostrictive hysteresis when the input signal is with the single low frequency. The data measured in the experiment are used for fuzzy modeling. The solution of numerical simulation shows that the new method is of high accuracy and low computational cost.