Abstract: Shape memory alloy (SMA) has advantages of great recovery stress and elastic modulus varied with the temperature, and therefore can be embedded in composite structure to actively control structure deformation and vibration. We derive recovery stress and elastic modulus at different temperatures by modifying the phasechange coefficient Ω of Liang’s constitutive model. Based on the stressstrain relation, the recovery stress is translated into recovery strain. Using ANSYS, we simulate the influence of recovery stress on the natural frequency and vibration response of composite plate under both ends of fixed conditions. In the experiments on composite plate with both ends under the same condition, we find characteristics of the natural frequency varying with temperature. The analysis results obtained with ANSYS are closed to experimental results, verifying correctness of the related method.