Abstract: Subtract In studying the cell death mechanism by radioactivity, people discovered that apoptosis is a kind of form in the died cell induced by radioactivity. Meanwhile, apoptosis is closely related with radioactivity. In the recently years, there are more and more article about apoptosis induced by radioactivity. The article review the phenomenon about apoptosis induced by radioactivity and the newest research about improving tumor control by radioactivity inducing apoptosis.