国内法的域外效力早已引起各国为政者和学界的关注。具有域外效力的国内法本身不违反国际法，在网络安全法的语境下，国家主权、属地管辖、属人管辖和保护管辖都可以作为其合法性依据。习近平总书记强调，“要加快推进我国法域外适用的法律体系建设”，但是我国现有网络安全管理规范中包含的域外效力条款却相对抽象笼统，域外效力实践也较为匮乏，因此，为更好实现我国网络安全法的域外效力，需要对其他国家域外司法管辖和域外执法管辖进行研究和借鉴。在域外司法管辖方面，为解决网络案件的州际管辖权冲突，美国法院会根据个案状况适用最低限度联系标准、效果标准和浮动判断标准；欧盟各国则通过欧盟法和国内法两部分的法律规范明确规定网络案件管辖权的适用规则。在域外执法管辖方面，美国和欧盟的有关机构设置精简、分工清晰，执法措施针对性强、威慑力大。当然，国内法域外效力难免会产生冲突，常表现为外交抗议、阻却立法和行政命令、禁诉令、报复等，但这些冲突可以通过单方、双方、多方途径协调处理。 本文首先梳理了我国的网络安全管理规范和网络安全法域外效力的相关概念，随后证明了网络安全法域外效力在国际法上的合法性，通过从司法和执法两个层面对照研究国外具有域外效力的相关法律和实践，探究强化网络安全法域外效力的具体方式，进而讨论国内法域外效力可能会带来的国际冲突及处理这些冲突的途径。最后提出建议，可以通过立法调整、扩大司法管辖权、灵活执法、加强国际合作等途径强化我国网络安全法的域外效力，以更充分地保护我国的国家利益和公民个人利益。

The extraterritorial effect of domestic law has long since raised concern among the administers and scholars. As such, domestic law with extraterritorial effect does not contravene international law, and in the context of cyber security law, state sovereignty, territorial jurisdiction, personal jurisdiction and protective jurisdiction prove the legality of it. President Xi Jinping stressed the importance of pushing through the construction of a domestic legal system with extraterritorial effect, but the formulation of such clauses in our cyber security law is rather abstract and general, and relevant practices are scarce. Therefore, to better achieve the extraterritoriality of our cyber security law, it is necessary to study and learn from foreign practices of extraterritorial judicial jurisdiction and enforcement jurisdiction. In the field of extraterritorial judicial jurisdiction, courts in the US would apply minimum contact doctrine, effect doctrine and sliding scale doctrine on a case-by-case basis to deal with jurisdictional conflicts among states in cyber-related cases; in the EU, rules of jurisdiction in cyber-related cases are stipulated explicitly in EU regulations and respective national regulations. With respect to extraterritorial enforcement jurisdiction, in both the US and the EU, the organization setup is clear cut with well-defined tasks, the enforcement measures are targeted and effective. Extraterritoriality unavoidably leads to conflicts, which are often manifested as diplomatic protests, blocking statutes and executive orders, anti-suit injunction and retaliation, but these conflicts can be resolved unilaterally, bilaterally and multilaterally. This article starts with an introduction of the cyber security law system in China and relevant concepts of extraterritoriality of cyber security law, and then proves the legality in international law of the extraterritorial effect of domestic cyber security law; by comparing relevant laws and practices from other countries, this article attempts to explore specific approaches to reinforcing the extraterritoriality of cyber security law, the possible international conflicts therein and ways to deal with these conflicts and finally propose suggestions to reinforce the extraterritoriality of cyber security law to provide full protection of our state and personal interests by adjusting legislation, extending judicial jurisdiction, enforcing the law flexibly and boosting international cooperation.