Medical radiation source device

The utility model relates to a medical radiation source device. The device comprises a radiation source body and a collimation body, wherein the radiation source body is provided with a radiation source hole, and the collimation body is provided with a collimator with a collimation hole. The device also comprises a source storage body arranged in the radiation source body, the source storage body matches the radiation source body in a rotary manner, and a radiation source is fixed in the source storage body. Rays of the radiation source successively penetrate through a pre-collimation hole of the source storage body, the radiation source hole in the radiation source body and the collimation hole of the collimation body and are orientated to a common focus of all the rays. The device further comprises a driving mechanism of the source storage body, wherein the source storage body is driven by the driving mechanism to rotate around the axis of itself. The device can safely and effectively protect important organs of patients against radiation damage of rays during treatment, and can flexibly and rapidly adjust the radiation amount and change the shape of radiation targets to reduce damage to healthy tissues of the patients.