Proton therapy is a new type of radiotherapy gradually recognized by everyone in recent years. Compared with traditional radiotherapy, proton therapy not only significantly increases the killing effect on tumor cells, but also greatly reduces the toxic and side effects of radiation on normal tissues and organs. It is an internationally recognized frontier tumor radiotherapy technology with ZI. Hong Kong An Jiankang's article said that compared with other emerging radiotherapy such as tomography, gamma knife and cyberknife, proton therapy has many advantages, such as high accuracy, small side effects, low tumor recurrence rate and high cure rate.