The invention discloses an adjustment device for a radiation device. The adjustment device for the radiation device comprises a base, a ray source support, a clamping device and a first adjustment device, wherein the base is fixed on the ray source support, a ray source device is placed on the base, and the clamping device is connected with the base so as to clamp the ray source device a certain first slide path is defined between the base and the ray source support, and the base clamping the ray source device is capable of moving along the first slide path in a predetermined direction the first adjustment device is combined with the base to drive the base to move along the first slide path. According to the adjustment device for the radiation device provided by the invention, a complete shielding effect is achieved with the least lead by optimizing the structure, and the ray source device is capable of being independently and accurately adjusted in three degrees of freedom, thus ensuring CT imaging quality in hardware.
