The invention belongs to the field of nuclear fuel processing and particularly discloses a device and method for treating high-fluorine materials. The device comprises a vacuum valve, a nitrogen back-blowing valve, a feeding valve, a discharging valve, a temporary storage bin, a reaction bin, an emptying valve and a filter. The method comprises the step that opening and closing of all the valves are designed during the evacuation time T1, the sucking time T2, the emptying time T3, the evacuation time T4, the vacuum breaking time T5, the discharging time T6, the positive pressure maintaining time T7 and the waiting time T8, and therefore sucking and treating of the high-fluorine materials are achieved. By the adoption of the device and method, the high-fluorine materials can be treated safely at the low cost through full-automatic operation.