自媒体时代，历史虚无主义借助碎片化、情绪化、圈层化的传播逻辑，演变为短视频、表情包等新形态，其危害显著加剧。传统以政府为中心的纠治模式难以应对多主体、跨平台的复杂局面。为摆脱当前纠治实践中存在的主体权责模糊、审核标准缺失、资源信息割裂、应急预防脱节等现实困境，须构建由主体协同、规则协同、资源协同、行动协同构成的四维协同机制，并从制度、技术、文化、评估四个维度提出实现路径与保障措施。政府、平台、公众、学界等多主体只有通过统一标准、资源共享与闭环行动，才能实现对历史虚无主义从被动清理到主动预防的根本转变，为自媒体时代网络历史信息的有效治理提供理论参照与实践启示。

In the age of self-media, historical nihilism, leveraging the fragmented, emotional, and circle-based logic of communication, has evolved into new forms such as short videos and memes, significantly exacerbating its harmful effects. The traditional government-centered rectification model struggles to cope with the complex landscape involving multiple actors and cross-platform interactions. To overcome the practical dilemmas in current rectification practices-including ambiguous rights and responsibilities among actors, absence of review standards, fragmentation of resources and information, and disconnect between emergency response and prevention-it is imperative to construct a four-dimensional collaborative mechanism comprising actor collaboration, rule collaboration, resource collaboration, and action collaboration. Furthermore, implementation pathways and safeguard measures should be pursued from the institutional, technological, cultural, and evaluative dimensions. Only through unified standards, resource sharing, and closed-loop actions can multiple actors—including government, platforms, the public, and academia-achieve a fundamental shift from passive cleanup to active prevention of historical nihilism, thereby offering theoretical references and practical implications for the effective governance of online historical information in the self-media era.