As the "Belt and Road" Initiative has been undertaken and the financial cooperation betw een the "Belt and Road" countries has been promoted ,the issues of financial supervision cooperation are be‐coming more and more prominent .Specifically ,bilateral financial supervision cooperation agreements lack binding force and enforcement force ,multilateral financial supervision cooperation ag reements lack system‐aticness ,and the coverage of financial supervision cooperation agreements are of low level .Besides ,there are no unified financial supervision cooperation standards and multinational coordination agencies ,and fi‐nancial information is not transparent .Analyzing the financial supervision cooperation mechanism for the "Belt and Road" countries systematically ,the article raises some proposals to solve the legal issues of the fi‐nancial supervision cooperation for the "Belt and Road" countries .Formulating the multilateral financial supervision cooperation rules should be based on the concept of good law governance ;in addition ,assisted by the guidance of major countries ,the implementation of multilateral financial regulations and rules have been achieved .