As an important part of China’s “Belt and Road” strategy，China-Mongolia-Russia Economic Corridor is an important channel for deepening all-round cooperation with Russia and Mongolia. In 2017，the bilateral trade volume between China and Russia，China and Mongolia both increased substantially. Facilities unicom remained to be the priority area for cooperation in the corridor and the cooperation in energy and equipment was further deepened. Therefore，this article summarizes the status quo of China-Mongolia-Russia economic cooperation in corridor construction，analyzes the difficulties and discusses the concrete advancing strategies of corridor construction to promote the healthy development of economic corridor.