Abstract: In order to solve the fire problem of carbon fiber reinforced polymer (CFRP) cable, a fire retardant mea-sure of CFRP cable was developed. The high temperature tensile test of CFRP tendons used for bridge cables was carried out, and the fire retardant effect of fire retardant coating, asbestos, ceramic fiber cloth was compared. The results show that the residual strength of the tendons at high temperature decreases linearly with the increase of temperature. After heating at 210℃ for 3 h, the minimum residual strength of the tendons is 2245.8 MPa, which is 26.13% lower than the original strength. After high temperature heating and then cooling, the strength of the tendons can be reversibly restored to a certain extent, and the residual strength can reach more than 2800 MPa, but it has a slight downward trend compared with the original strength, and the higher the heating temperature, the lower the residual strength. The fire retardant coating has a good effect by comparing. After 2 h of burning, the maximum temperature of inner surface of polyethylene (PE) sheath is 206℃. The thicker the fire retardant coating is, the longer the protection time will be. The maximum temperature of the inner surface of PE sheath is 245℃ when the cable strand with 2 mm thickness fire retardant coating is burned for 6 h. The PE sheath is not damaged, but only softened. The results show that the fire retardant coating can effectively protect the CFRP cable. The CFRP tendons can still bear the load within 2 h after fire, and the residual strength is more than 2245 MPa.