Abstract:In order to improve the safety protection ability of operating bridges, taking a single span steel truss suspension bridge with a span of 636m as an example, the replacement of tie rods of the main cable anchorage system of the suspension bridge is designed and studied. This paper mainly discusses the construction and monitoring requirements, anti-corrosion measures and material requirements in the design of tie rod replacement in the cable strand connector of suspension bridge anchorage system, which has great reference value for the preventive maintenance engineering of operating bridges and improving the safety protection ability of operating bridges.