The invention discloses a ray accelerator treatment head which comprises a vertically arranged accelerating pipe, a primary collimation cone arranged at the lower end of the accelerating pipe, and a multi-leaf collimator located below the primary collimation cone. A movable gear bracket and a gear switching driver are arranged under the primary collimation cone; multiple ray gears are arranged onthe movable gear bracket; and the gear switching driver can drive the movable gear bracket to move, so that the different ray gears align at the primary collimation cone so as to switch a treatment mode. The gear switching driver drives the movable gear bracket to move, so that the ray gears can be further switched, the limiting of a ray field range and the switching of multiple treatment modes can be realized within a limited space, the equipment integrates the multiple treatment modes, the gears can be switched conveniently and quickly, the equipment applicability is improved, and the fast,safe and accurate clinic demand can be met. The invention further discloses tumor radiotherapy equipment comprising the ray accelerator treatment head.