Objective To review the radiosensitivity and radiosensitivity-related therapy for tumor. Methods Fifty-nine articles in the recent ten years were analysed. Results The radiosensitivity and radiosensitivity-related therapy was connected with post-radiosensitivity DNA damage, rehabilitation, cell period, and multigene regulation in the tumor. Conclusion There is a good future for radiosensitivity-related therapy for tumor with the development of molecular research.