Japan treated “the Belt and Road” as a strategy to weaken its economy influence in Asia，refused to join in，and put forward “Partnership with Quality Infrastructure” to compete with “the Belt and Road”. But the situation on Sino-Japanese economy and trade shows that the two countries at the present stage still depend on each other. At the same time，it is possible for China and Japan to cooperate under the framework of “the Belt and Road”. The report suggests that China should develop political cooperation through economic development and dilute disputes，promote the official communication through folk communication，put forward big events through small ones and pay more attention to the development of Japan-South Korea FTA，be strong and prosperous to provide a solid financial support for “the Belt and Road”. With strengthening cooperation，China and Japan will achieve mutual benefit and win-win results.