Humanization is not only a new concept and value-oriented, but also an ever-increasing positive phenomena in international law. Contemporary international law has been contributing to the establishment and improvement of global peace and development order for the co-existence among States on the one hand, and making endeavors to the formation and maintenance of humanizing order,which is both “individual-oriented” and “humankind-oriented”. Such a humanizing phenomenon undoubtedly represents the advanced trend of international law, enriches its contents, updates some of its classic branches and impacts on the basic principle of reciprocity on which it is created and developed. However, the humanization of international law could not have taken shape without common accords among States by means of either treaties or customary rules; and without cooperation among States, the humanistic value of international law can never become true no matter how sublime it is.