192Ir(iridium) after-loading source applicator calibrator

The utility model relates to a medical auxiliary instrument, in particular to a 192Ir(iridium) after-loading source applicator calibrator. The 192Ir after-loading source applicator calibrator is characterized by comprising a source applicator and a calibration ruler, wherein the front end of the calibration ruler sleeves the source applicator through a clamp ring, the clamp ring is provided with an opening, one end of the opening is fixedly connected with a clamp lock, a groove for the clamp lock to move is formed in the other end of the opening, an elastic clamp piece is arranged on a port of the groove, the elastic clamp piece is of a ring structure, the inner wall of the elastic clamp piece fits the clamp lock, a slide groove which fits the outer wall of the source applicator is arranged in the detection moving direction of the calibration ruler, the source applicator is located in the slide groove, the front haft of the source applicator and the rear half of the calibration ruler are provided with scale lines, and numerical values of the scale lines are gradually increased from the end inside. The 192Ir after-loading source applicator calibrator can mark the depth on the premise of achieving a fixing function, improves accuracy of 192Ir after-loading therapy, is convenient and accurate, reduces workloads of medical personnel, reduces operation risk, and improves operation success rate.