Abstract: This paper has analyzed the present situation of coal enterprise internationalization and the important status of coal enterprise in the national economy development and the energy security strategy. According to the concept and connotation of national energy security, the paper elaborates the complex relations between coal enterprise internationalization and the national energy security strategy, from the coal resources safeguard ability, the supply and demand balance and the ecological environment aspects. Besides the paper points out that the internationalization of coal enterprise is a strategy which involves national economy and the people's livelihood, and should be studied as important as the national energy security strategy.