Abstract: It is necessary to take into account the issue of harmonization between aviation law and outer space law because of the relevance between them. The harmonizatio n should focus on the following fields, i.e., delimitation of outer space, inter national liability for damage caused by space objects, the management system of sub-orbit spacecraft relating to space tourism, the prevention and co ntrol of space pollution etc. The harmonization at the domestic law and internat ional law levels are the two main methods of harmonization.