The invention belongs to the technical field of radiotherapy, and specifically relates to a radiotherapy body position fixing frame, which includes a positioning frame, an omentum plate, a reset unit and a posture controller; each time a radiotherapy position is performed, the human body needs to be repeatedly moved and rotated to meet the The positional accuracy required for radiotherapy results in longer time spent on positioning, prolongs the time for the radiotherapist to maintain a fixed posture, and reduces the comfort experience of the radiotherapist; therefore, the present invention cooperates with The monitoring of the angular velocity sensor in the attitude controller can control the operation of the electronically controlled translation table and the electronically controlled slewing frame in real time, so that after the human body posture changes, the radiotherapy operator can minimize the impact on the radiotherapy site and the radiotherapy equipment head when adjusting the body position. The amount of attitude change keeps the attitude change of the radiotherapy part of the human body and the head of the radiotherapy equipment within the range required by the radiotherapy process, ensuring stable radiotherapy and improving the comfort experience of the human body during radiotherapy.