Abstract: In the live-line operation training of the power system, to ensure the safety of personnel, an electric shock protection system with multi-dimensional safety assessment and hierarchical protection strategies is particularly important. By constructing multi-dimensional risk assessment indicators of "human-equipment-environment", a fuzzy logic algorithm is used to quantify the electric shock risk level. When the risk is low, audio-visual warnings are triggered and operations are forcibly suspended. When the risk is medium, the voltage is limited to a safe threshold. When the risk is high, a fast-acting switch is triggered to cut off the power. The comprehensive response time is controlled within 5 ms. An embedded controller developed based on FPGA realizes the full closed-loop control of risk assessment, protection decision-making, and execution. It has beens tested in real training scenarios, and the malfunction rate of the system is less than 0.1%.