Abstract: The frequent occurrence of major epidemic public crises all around the world has made a huge test for the China's national emergency management system and the global health security system. The paper aims at the process of joint prevention and control of coronavirus disease (COVID-19) in China and uses grounded theory to make an exploratory analysis by taking the two major military and civilian systems as the core. The study summarizes four main categories including the unified command, arms control, civil defense and risk prediction. Then we builds a model of the military-civilian collaborative governance mechanism under the background of public crisis, and an elemental correlation mechanism from different subject perspectives. It has been found that unified command is the driving mechanism for military-civilian collaborative governance, it plans for crisis management and economic development as a whole from the strategic level. Arms control and civil defense are the motivation mechanism for military-civilian collaborative governance, through joint action to protect governance needs and fulfill social responsibilities. Risk prediction is the feedback mechanism for military-civilian collaborative governance, it takes risk assessment as the basis for decision-making of the governance subjects. The conclusion provides theoretical guidance and practical inspiration for the improvement of China's national major epidemic management system and the global epidemic situation.

摘要： 重大疫情公共危机事件在全球范围内的频发，使国家应急管理体系建设与世界公共卫生安全面临巨大考验。本文针对中国新冠肺炎疫情联防联控过程，以军民两大系统为核心，运用扎根理论方法对重大疫情防控中多主体的行动策略做出探索性分析。归纳出统一指挥、军控手段、民防措施和风险预警四个主范畴，初步构建了重大疫情公共危机背景下的军民协同治理机制模型，并以不同主体视角建立起要素关联机制。研究发现，统一指挥是军民协同治理的驱动机制，从战略层对危机治理与经济发展进行统筹规划；军控手段与民防措施是军民协同治理的动力机制，通过联合行动保障治理需求、履行社会责任；风险预警是军民协同治理的反馈机制，以风险评估作为决策依据并反馈于治理主体。研究结论对健全我国国家重大疫情治理体系、应对全球疫情形势提供了理论指导与实践启示。