Abstract Visions on maritime security of China and the US afford an important perspective for understanding the maritime strategic interaction between China and the US and China-US relations. Although both countries advocate maritime security, there is a huge difference in visions on maritime security of China and the US, and a sharp contrast is witnessed in how to ensure maritime security. China's maritime security policy takes its root in the security dilemma, and the policy is made to seek maritime security, national security and sustainable development of the nation. However, the US policy, in line with Pax Americana, is implemented to promote maritime hegemony and go after ultimate maritime security. The two countries have conducted a confrontational contest in the field of maritime security. The US takes a traditional means of defending the established powers against the rising powers to deal with Chinas rise in maritime influence. Despite with no intent to challenge the maritime hegemony of the US and aspiring for an equitable new maritime order, China objectively remodels the existing maritime order and ocean rules dominated by the US to a certain extent.