At present, the research on the performance of the shear and durability of CFRP reinforced concrete beams is few, the destruction of the curved and scissor section is often much subtle and suddenly. Based on the experimental investigation on the durableness of the CFRP concrete beams which has been shear reinforced and non-reinforced in the chloride ion erode, a comparative analysis on the fissure development, deflection, electrochemistry index and strain of the concrete beam were given under load. The results indicate that carbon fiber could limit the fissure development efficiently, and there were not the shear failure after loading, the beams with carbon could improve its shear capacity and durability efficiently, But The increase of durability is more depends on the reinforcement way.