Through determining the stable electric potential, the corrosion rate and the anodic polarization curve of three types of reinforcing steel HPB235, HRB335 and HRB400 in simulated concrete pore solution at different pH value and chloride ion concentration, the variation rule of corrosion parameters were analyzed, and the corrosion properties of the three types of reinforcing steel were compared. The results show that the ability against chloride ion erosion of the three types of reinforcing steel becomes weak with decreasing pH value of the simulated concrete pore solution. For the same pH value of simulated concrete pore solution, chloride ion concentration has great influence on the material corrosion behavior. In the pore solution with pH=13.6, the three kinds of reinforced steel exposed to high concentrations of chloride ion（0.30 mol/L） can still keep good corrosion resistance. However, in the pore solution with pH=12.5, the trace chloride ion contents（0.05 mol/L） can destroy the passive film and seriously corrode the materials. The three types of steel have a high corrosion tendency because they cant form a passive film in the concrete pores solution with pH=10.0. Among the three kinds of reinforcing steel under the same ambient condition, corrosion resistance of HPB235 steel is the best, and HRB335 is the next, HRB400 steel is the worst.