Abstract：Artificial intelligence (AI), especially deep learning, has shown extraordinary ability in the field of medical treatment,
which has brought breakthrough progress to tumor radiotherapy. In order to introduce the progress of AI in the field of tumor
radiotherapy in the past three years, two databases, PubMed and CNKI, were searched in this study, and references included in the
study were searched manually. The search was conducted from January 1, 2014 to July 31, 2019, and a total of 38 studies were
included. Among them, 14 studies related to the delineation of target areas and organs at risk, 12 studies related to the development
of radiotherapy plans, 5 studies related to the prediction of toxic and side effects, and 7 studies related to the prediction of prognosis.
In fact, AI technology has achieved good results in the field of tumor radiotherapy, and will show a broader application prospect in
tumor radiotherapy.
