Abstract: This article sorts out the UK national data security governance measures from two aspects. First, the UK national data security governance system is divided into five parts: personal data security, government data security, network data security, data ethics security and artificial intelligence data security; The second is to sort out the powers and responsibilities of the UK data security governance institutions and analyze their characteristics. After years of evolution and changes in the UK national data security governance, its institutional evolution is from the outside to the inside. Focusing on personal data security and human rights, the UK was an early adopter of regulatory sandbox governance mechanism. Many related systems are still applicable after it left the EU. In terms of institutions, governance system of "one center, one network" has been developed. Finally, four suggestions are put forward in view of the current situation of data security governance in our country, that is, to improve a data security governance institutional system of "one center and one network", to build a data ethical cooperation mechanism among multiple stakeholders, to establish a supervision sandbox mechanism to effectively prevent and control data security risks, and to improve the institutional system of data security in the cross-border circulation.

Key words: United Kingdom, Data Security, Data Governance, Institutional System, Data Ethics