The construction of professional ethic plays a significant role in the process of the professionalism and specialization of the college counsellor team. The historical mission and career anchor of college counsellor are vital for their professional ethic cultivation. The category of counsellor’s professional ethic includes ethic of responsibility，conscience and value. College counsellor should improve study capacity in a modern view and becomes the intimate friend of college students. The college should strengthen the professional ethic construction during the process of specialization development of college counsellor so as to establish a favorable cultural environment of professional ethic culture.