Treatment head for radiotherapy and radiotherapy equipment

The invention discloses a treatment head of radiotherapy equipment, which comprises a ray shielding body and a collimator driving device, and is characterized in that the ray shielding body is internally provided with a ray source, a first-stage collimator provided with a group of collimation holes, a second-stage collimator provided with a group of collimation holes, and a third-stage collimator provided with a plurality of groups of collimation holes with different apertures; rays of a ray source are suitable for sequentially penetrating through one group of collimation holes of the first-stage collimator, one group of collimation holes of the second-stage collimator and one group of collimation holes of the plurality of groups of collimation holes of the matched third-stage collimator to be focused at one point; the collimator driving device drives the second-level collimator and the third-level collimator to rotate through a hollow second-level collimator driving shaft and a hollow third-level collimator