The cavitation erosion of shape memory alloy Fe-14Mn-6Si-9Cr-5Ni-Nb-Ce in 3.5% NaCl solution was investigated by using an ultrasonic vibratory apparatus. Free corrosion potential and polarisation curves of the alloy in 3.5% NaCl solution under quiescent and cavitating condition were studied. The results show that Fe-14Mn-6Si-9Cr-5Ni-Nb-Ce alloy has excellent cavitation erosion resistance in 3.5% NaCl solution, cavitation erosion rate is 0.37 mg/h. Cavitation can shift free corrosion potential of the alloy in the active direction for about –65 mV. Corrosion current of Fe-14Mn-6Si-9Cr-5Ni-Nb-Ce alloy is very low in 3.5% NaCl solution under quiescent and cavitating condition, therefore, Fe-14Mn-6Si-9Cr-5Ni-Nb-Ce alloy shows high corrosion resistance. The relative contribution of electrochemical corrosion rate and pure mechanical erosion-induced corrosion rate to the overall cavitation eroson only amounts to 2.24%