The utility model relates to a line fault prompting device with a 10kV line light sensation alarm function, and belongs to the technical field of line fault prompting devices. The technical problem tobe solved is to solve. The utility model provides a line fault prompting device with a 10kV line light sensation alarm function. The technical scheme for solving the technical problem is as follows:the technical scheme is adopted; the device comprises an insulating shell, the insulating shell is specifically in a hollow cylinder shape, the inner diameter of the insulating shell is matched with the diameter of a measuring cable, openings are formed in the shell walls of the two opposite sides of the insulating shell in the axial direction, the insulating shell is divided into two halves, andthe two halves of the insulating shell are connected and fixed through a buckle arranged in the middle; the two ends of the insulating shell are also provided with metal fixing clamps, and the metal fixing clamps fix the two clamping pieces on the measuring cable through screws. The metal fixing clamp extends outwards to form a fixing support in the radial direction, the extending end of the fixing support is connected with contacts, and the contacts at the two ends of the insulating shell are connected through a detection pipe. The device is installed and applied to a 10kV power transmissionline.