The electrochemical protection mostly in terms of cathodic protection for steel reinforcing concrete structures aims to restrain or prevent the premature failure or damage of the structure due to corrosion of rebar. The research and development of the protection have been more and more attached great importance to control the corrosion since 1973. In this paper, progress in cathodic protection for concrete structures in the last 25 years is reviewed, and concentrated on practical sections, such as cathodic protection criteria, engineering design, assessment of protection effectiveness, inspection and monitoring of the system both in impressed current method and in sacrificial anode method. Suggestions are that diverse and comprehensive measures for corrosion control should be taken in accordance with the condition of structure situated and new electrochemical techniques to remove chloride from concrete structures and to realkalize the environment at steel/concrete interface which are to be useful protective treatments, particularly, for existing structures should be extensively developed.