Abstract: The whole life cycle of carbon fiber reinforced polymer composite from production, service to retirement will produce huge amount of waste, bringing serious environmental pollution and resource waste. In this paper, the waste carbon fiber produced in the production process was added to the concrete to study its influence law and mechanism on the strength and conductivity of concrete. The results show that the recovery effect of carbon fiber on the strength of concrete is not obvious, because the coating on the surface of industrial carbon fiber makes it easier to gather into bundles and not easy to disperse in the process of concrete mixing. The incorporation of recycling carbon fiber can significantly improve the conductivity of concrete. When the content of recycling carbon fiber is 0wt%-0.3wt%, the drying/water absorption process changes the pore structure of concrete. And the C—S—H gel rearrangement, local shrinkage and partial irreversible characteristics make concrete produce a new conductive path. The resistivity increases first and then decreases with the decrease of water content. When the content is 0.4wt%-1.5wt%, a stable physical contact conductive network is formed in the concrete, and the age and moisture content have no obvious effect on the conductivity.