政府公共传播是组织传播和媒介规范的交叉概念。作为推动民主社会进程的机制构 成，政府公共传播是基于公共决策、信息接近和社会责任的最佳社会决策框架而建立的 “公共话语系统”。社交媒体重构了政府公共传播的要素指涉语境，“秩序协同”成为我 国政府公共传播话语实践的主导模式。通过运用语境重构方法对微信平台的政府公共传播 多元话语主体生成的关键文本进行文本间语境重构分析，以检验政府公共传播各行动者在 社交媒体的策略实践能力。研究发现，在重大公共事件传播中，官方机构以“权威发布” 的强话语文本建构公共传播“主调”，并通过机构间文本互文和修辞维持话语秩序。媒体文本对政府文本，尤其是关键文本高度依赖并将“协作修辞”作为其主要话语策略，此外，公众参与政府公共传播的话语空间仍然有限。据此，本文提出了我国政府公共传播的 “协同责任”媒介规范理论，主张社会责任论与公民参与相结合的责任协同范式。

Government public communication is an intersectional concept of organizational communication and media norms. As a mechanism to promote the process of democratic society, government public communication is a “public discourse system” based on the best social decisionmaking framework of public decision-making, information access and social responsibility. With the reconstruction of the elemental context for government public communication in social media, “norm collaboration” has become the dominant mode of discourse practice in government public communication. This paper attempts to testify the strategic practice capability of multiple actors of government public communication on social media by analyzing the key texts with the method of recontextualization. It is found that in the major public events, the official institutions construct the “main tone” of public communication with the strong discursive text of “authoritative release”, and maintain the discourse order by means of intertextuality and rhetoric across the institutions. Media texts are highly dependent on government texts, especially its key texts, and take “collaborative rhetoric” as their main discourse strategy. In addition, the discourse space for the public to participate in government public communication is still restricted. Therefore, this paper puts forward the media normative theory of “collaborative responsibility” for government public communication in the domestic context, and advocates a collaborative paradigm of responsibility that combines social responsibility tradition with citizen participation.