ASEAN Defence Ministers’ Meeting-Plus（ADMM-Plus）in last October has provided the region with a new platform for the security cooperation.It is important for the region security cooperation，as well as for ASEAN.As the first official security cooperation in this region，ADMM+，with 5 priorities for the practical cooperation，is the requirement from Asean internal integration，competition with other regional security mechanisms and driving force status.Meanwhile，ADMM+ has been accepted by the big powers，especially the United States and China.However，the new cooperation’s future relies upon the Asean security community process，the division of labor with the existing cooperation，the relationship with big powers and the capacity building.