In the context of various great challenges in British domestic and foreign policies，the UK General Election 2015 has concluded surprisingly with a Conservative majority government and a second term for David Cameron as the Prime Minister. This report will explore reasons and impacts of the Conservatives’success from the perspectives of politics，economy，foreign relations，Sino-British relations etc. Some in-depth analysis will be made on the post-election development of the emerging fragmentation in British party politics，further adjustments of the devolution in the UK after the Scottish independence referendum，the sustainability of the strong economic growth of the UK after the longest economic recession after WWII，and new changes in the British foreign policy（especially in Sino-UK relations and British- EU relations）.