The length distribution of carbon fibers in CFRC(carbon fiber reinforced cement) with different mixing mode was studied. The influence of the length of carbon fiber on the resistivity and strength of CFRC was discussed, It is found out that mixing mode influences the length distribution of carbon fiber in CFRC greatly. And the longer the average length of carbon fiber, the higher the tensile strength and the smaller the resistivity of CFRC, when the carbon fibers are fully distributed.