Abstract: The area along“Belt and Road”abounds in potash resources, about 51.1% of the total proved reserves of potash resources in the world.It is the main production base of potash mine, also is the major importing countries of potash mine for china.Mining investment overseas potash mine is an important way to solve the serious shortage of potash resources in china.Proposed to strengthen comprehensive evaluation of potash resources potential in the countries (regions) along “Belt and Road”.It was suggested to give priority to China’s neighboring countries of potash resources，such as potassium salts in Laos, Thailand, Turkmenistan, Uzbekistan and Kazakhstan.