Mouth-opening tongue-depressing radio protection fixing device

The utility model provides a radiation protection fixing device with mouth gag and spatula, pertaining to an assistant tool for radiotherapy, which consists of a bottom panel (1), a surface panel (2) and a supporting stem (3). The device is characterized in that the front ends of the bottom panel (1) and the surface panel (2) are connected in circular-arc shape and back ends are joined as a whole through the supporting stem (3). On the upper surface of the surface panel is equipped with a plurality of uniform steps (4), the edge of them are very smooth. Advantages of the utility model are found in that: simple structure, convenient for using, good repeatability, could be repeatedly used after cleaning and sterilizing and applies to the patients of different sizes of mouth shape; because the front end is in circular-arc shape, the model could avoid stabbing the the oral mucosa of patient; could keep the mouth shape and tongue in a fixed position in course of treatment; and could keep the normal tissue from being radiated as much as possible while radiating different diseases.