The capital is an important representative of the country，and it has created special security requirements different from those of ordinary cities in terms of urban security governance. This article describes the security maintenance experience in Washington D.C.，the capital of the United States，London，the capital of the United Kingdom，and Tokyo，the capital of Japan. After sorting out and analyzing，it can be seen that the community-based capital security governance model，the model of common prevention of terrorism，and the diversified security mode of capital city activities are the inevitable choice under objective requirements in the large-scale，iconic urban security supply system. Relevant experience and models can be referenced and used in Beijing security governance system.