The research result shows that the corrosion of reinforcement is one of the dominating factor for decreasing the durability of reinforced concrete structures. In this paper, the significance of the research of corroded reinforced concrete is presented, and an attempt is made to integrate the latest development with regard to the mechanical behaviors of reinforcement corrosion, the damage of concrete due to corroded bars, bond relationship between corroded bars and concrete, as well as the load capacity of corroded reinforced concrete flexural member and compressive member and the seismic behavior of corroded reinforced concrete element. And the trend of its development in future is discussed as well.