摘要：We present a scheme for probabilistic transformation of special quantum states assisted by auxiliary *** our scheme,if quantum states can be rewritten in a particular form,it is possible to transform such states into other states using lowerdimensional unitary operations that can be more easily realized in physical ***,as an important application,we propose a generalized scheme that helps construct faithful quantum channels via various probabilistic channels when considering the existence of nonmaximally-entangled states.