The invention relates to a positioning and fixing device for tumor radiotherapy, and belongs to the technical field of
medical instruments. In order to solve the problems of poor radiotherapy effect, body burden of a patient and the like caused by the influence of the
body shape change of the patient on radiotherapy positioning at present, a headrest checking mechanism, a mold forming mechanism, a
trunk wrapping and fixing mechanism, a
lower limb limiting mechanism and a main controller are arranged, and the headrest checking mechanism corresponds to the
head position of the patient in a
lying position; the mold forming mechanism is adjacent to the headrest checking mechanism, the
trunk wrapping and fixing mechanism is arranged above the mold forming mechanism, the
lower limb limiting mechanism is arranged at the end, close to the
tail, of the mold forming mechanism, and the main controller is arranged at the rear end of the
lower limb limiting mechanism; the main controller is in communication connection with the headrest checking mechanism, the mold forming mechanism and the
trunk wrapping and fixing mechanism. The device can be adaptively adjusted according to the posture of a patient, so that the influence of the
body shape change of the patient on the radiotherapy precision is avoided, and the radiotherapy positioning time and the
workload of doctors are shortened.