The present disclosure discloses a radiation treatment device and pertains to the field of medical appliance technologies. The radiation treatment device includes a radiotherapy unit and an imaging unit. The radiotherapy unit is configured to emit a treatment beam to a to-be-treated region in a patient, wherein the to-be-treated region in the patient is located outside the radiotherapy unit. The imaging unit is arranged adjacent to the radiotherapy unit and is configured to emit an imaging beam to the to-be-treated region in the patient. Without moving the to-be-treated region in a patient, the radiotherapy unit may emit the treatment beam to the to-be-treated region in the patient according to the treatment plan worked out to execute the radiation treatment, such that the accuracy of the radiation treatment is improved.
