Introduction   In order to ensure the safe and stable operation of overhead transmission lines, improve the stability and safety of transmission line slope, strengthen the awareness of operation and maintenance personnel of transmission line slope in mountainous areas, and improve the management ability of slope risk.

    Method   Taking the 34-grade tower slope of Shenzhen 500 kV Pengshen A-B Line as the evaluation object, combining with the engineering geological research methods and the accumulation of practical experience, a set of risk assessment index system conforming to the characteristics of the transmission line slope is constructed, and the risk grade of the slope is determined; and the corresponding risk control countermeasures and risk grading management measures are formulated. Emergency measures and procedures for dealing with unexpected accidents are proposed.

    Result   The results of slope risk assessment corroborate the actual situation of the slope. It can classify the risk grade of the slope simply, efficiently and reasonably. The corresponding risk control countermeasures and grading management measures can effectively reduce the risk of the slope.

    Conclusion   The proposed risk assessment methods and risk management ideas basically meet the management needs of transmission line slope, and have great practical value for improving the risk response ability of the operation and maintenance management department of transmission line slope and reducing the risk of transmission line slope.