The influence of testing temperature on vibration characteristics of a Ti-50.2at.%Ni shape memory alloy combining with a spring was investigated by the system with additional elastic load in this paper. The experimental results showed that under restriction of a spring emplaced in different ways in a testing system, the effect of maximum load, stiffness of the spring and proportion of elastic force under different testing temperatures exhibit a complicated way. In the case of the TiNi alloy sample subjected to a tensile force of the spring with a maximum load of 22kg and a proportion of elastic force 33%, it has a good damping capacity at 333K. When the temperature increases to 353K and 363K, the resonance frequencies of the alloy decrease. When the proportion of elastic force is up to 68%, the TiNi alloy at 333K has a high resonance peak value, and the rise of temperature leads to a decrease of the resonance peak value and an improvement on the damping capacity of the alloy. When the maximum load and the stiffness of the spring are 17kg and 1.47x10(4)N/m respectively, the alloy at 333K has a high resonance peak value and low resonance frequencies, In the case of the tensile force of weight partially counteracted by the spring, the temperature has little effect on the vibration characteristics of the TiNi alloy at the range of frequencies tested.