Based on three major phases of“project approval,scope adjustment,steady promotion”,the main development process of“ISO 20893:Space systems-Detailed Space Debris Mitigation Requirements for Launch Vehicle Orbital Stages”is reviewed in this paper.Interpretation of the background and deep purpose of main contents about avoiding the release of operational space debris,preventing break-ups in Earth orbit,avoiding collision,de-orbit disposal as well as re-entry is also made.Aiming at current situation of domestic launch vehicle industry,related suggestions on the aspects of SC/LV coordination of launching orbit,controlled de-orbit of orbital stage and re-entry of large stage are given as well.