Abstract: Nano conductive carbon black Super-P (CBSP) with low cost and high stability was used as additive of cement concrete. By setting different water-cement ratios and different CBSP contents, the effects of CBSP addition on various properties of concrete (slump, mechanical properties, impermeability, electrical conductivity and temperature sensitivity) were studied. The microstructure of concrete was analyzed by SEM. The experimental results show that the slump of concrete decreases with the addition of CBSP. With the increase of CBSP content, the mechanical properties of concrete improve first and then decrease, and the change trend of each age is similar. When the CBSP content is 0.75wt%, the mechanical properties reach the maximum. Meanwhile, the mechanical properties of concrete decrease with the increase of water cement ratio. The impermeability of concrete increases first and then decreases with the increase of CBSP content and decreases when the water-cement ratio is large. When CBSP content is 0.75wt%-2wt%, the resistivity of concrete decreases rapidly. The resistivity of concrete cured by standard curing condition is lower than that cured by indoor drying. The resistivity of concrete with different water cement ratios has little difference. SEM shows that CBSP fills pores and conducts electricity in tunnels. Experiments show that the addition of CBSP can improve the performance of concrete.