After Kim Jongun became the supreme leader of the Democratic People's Republic of Korea (DPRK), he has launched several nuclear pilot tests regardless strongly protest from the international society, resulting in the worse situation on the Korean Peninsula, and indirectly preventing relationship development between China and South Korea. With the temporary end of South Korea’s Terminal High Altitude Area Defense (THAAD) System and South Korean President Moon Jaein’s successful visit to China, relationship between South Korea and China has returned to the direction of mutual benefit and win-win, and has provided a good opportunity to realize the docking of the “Belt and Road” Initiative with South Korea. In this Paper, the literature research method is applied to demonstrate and analyze under the current time’s background, the feasibility of docking of the “Belt and Road” Initiative with South Korea and promoting regional cooperation of Northeast Asia through the “Korea․China+” Economic Corridor Concept. Meanwhile, it demonstrates that the Concept will promote regional cooperation between the two countries, and stimulate countries concerned in proactively participating in the construction of the B&R, to bring the Korean Peninsula back to the regular track of peace and development.