In order to systematically analyze the potential association of the causes of electricshock accidents and provide decision-making basis for preventing or reducing accidents， 84e-lectric shockaccidents are analyzed.HumanFactorsAnalysis and Classification System(H FACS) is used to classify human factors of accident causes.Frequency analysis and latentclass analysis(LCA) are adopted to explore the associations among the causes.The resultsshowed that organizational process loopholes， inadequate supervision and poor technical en-vironment are the major causes of electrocution accidents， and the poor management cul-ture， inappropriate operation and poor skill level of workers are three major classes of acci-dent chains.Corresponding countermeasures and suggestions were proposed by synthesizingthe results.