Device and method for measuring dose distribution of applicator

The invention discloses a device and a method for measuring dose distribution of an applicator, and relates to the technical field of radiotherapy equipment. The device for measuring the dose distribution of the applicator comprises a fixed module and a radiation sensitive film, a hollowed-out groove is formed in the middle of the fixing module, and an opening of the hollowed-out groove faces upwards. The radiation sensitive film is arranged in the fixed module, the radiation sensitive film is provided with a notch part corresponding to the hollowed-out groove, the opening side of the notch part and the opening of the hollowed-out groove face the same direction, and the hollowed-out groove and the notch part jointly form a containing cavity used for containing the treatment device to be measured; wherein the shape of the notch part is matched with the shape of the cross section of the hollowed-out groove in the length direction, and the wall face of the notch part is tangent to the inner wall face of the holl