Members of this group have full control of all domains in the forest. By default, this group is a member of the Administrators group on all domain controllers in the forest. By default, the Administrator account is a member of this group. Because this group has full control of the forest, add users with caution. http://www.virmansec.com/blogs/skhairuddin

Hello Why enterpris admins group in Users container has not full control permission?

What problem do you solve? What operating system do you have? This security settings are by design. Remember this rule applies to Delete and Delete subtree for This object only and imagine the consequences of Full rights.

OS: Windows server 2008 R2 Why security settings are so?

Members of this group have full control of all domains in the forest. By default, this group is a member of the Administrators group on all domain controllers in the forest. By default, the Administrator account is a member of this group. Because this group has full control of the forest, add users with caution. http://www.virmansec.com/blogs/skhairuddin