The United Kingdom is a big country of press. Its achievements as well as problems over the years have been noticed in the world. The press regulation is a complex issue as it has to balance press freedom and public interest，resulting in complex struggles and compromises among different parties. The latest reform of press regulation since 2011 after phone-hacking scandal has experienced many hurdles and setbacks，and has not finished yet. This paper explores and analyses these developments on the basis of reviewing the history of press regulation in the UK.