One of the most important issues after achieving a healthy friendship is maintaining and promoting it. Examining the various dimensions of the health of friendship in order to provide the basis for a vibrant and healthy life has been mentioned in Alavi teachings and specifically in Nahj al-Balaghah. This descriptive-analytical article addresses this issue and examines it in three axes: the importance of healthy friendship, the harms of unhealthy friendship, and the ways to maintain and improve the health of friendship in Nahj al-Balaghah. Finally, it indicates that respecting the rights of friends, moderation in friendship, avoiding jealousy among friends, trust, support, and loyalty are considered the main elements of maintaining and promoting the health of friendship