Video inspection device for fuel assembly repair and use method thereof

The invention provides a video inspection device for repairing a fuel assembly and a use method of the video inspection device. The video inspection device comprises a fixing device, a cantilever support, a clamping device and a camera shooting assembly. The securing device is configured to be mounted on a fuel elevator securing base. The cantilever support comprises a first support, a second support and a third support which are sequentially connected from the side close to the fixing device. And the second bracket and the first bracket as well as the second bracket and the third bracket are connected with each other through a fixed rotating shaft and a quick release pin. And the clamping device is connected with the third bracket. The clamping device is configured to clamp the camera assembly. The camera assembly can be quickly adjusted to different height positions of the fuel assembly through cooperation of the cantilever support and the clamping device in the video inspection device, so that the camera a