The invention discloses a device for unloading a fuel pellet. The device for unloading the fuel pellet comprises a base, a drive system, a locating system and a knocking system, wherein the drive system and the locating system are arranged on the base; the knocking system comprises a core bar and a hammer body which is coaxially and fixedly connected with the core bar; one end of the core bar is connected with the drive system; the other end of the core bar is adjacent to the locating system; the drive system drives the core bar to elevate oppositely to the locating system; the locating system comprises a component for clamping a fuel rod; the axis of the fuel rod and the axis of the core bar are overlapped by the component. By adopting the device for unloading the fuel pellet, disclosed by the invention, knocking force of the knocking system can accurately act on the axis of the fuel pellet, so that the damage to zirconium cladding is reduced, mechanical scratches are relieved, and the device is convenient to unload.