Abstract: The paper analyzed the advantage conditions of Fengman dam foundation and dam body, and indicted that the present problems of Fengman dam were resulted from the issues left by its congenital birth defects. It also analyzed the varying conditions of dambody corrosion, concrete strength and the fault F67 near 70 years, and put forward the feasibility on Fengman dam repair and strengthening. It pointed out that the key issue is to solve the leakage occurred in the section A of the upstream face. To stop the leakage will eliminate the disadvantage effects on concrete durability and hidden issues on flood release. Reference as the operation practice near 70 years, it’s no problem for Fengman dam in the foreseeable future that it safely operate another 70 years after anti-seepage strengthening measures taken, the same as the synthetic treatment measures taken to solve the other problems.