The invention belongs to the technical field of related equipment of kinetic energy devices, and discloses a current limiting and motion limiting safety rod for kinetic energy devices. The right sideof a moving rod is connected with the left side of a current limiting tube by pulling and plugging. The left end of the moving rod is fixedly connected with an electric plate through a bearing frame.The right end of the current limiting tube is fixedly connected with the inner wall of an accumulator shell through the bearing frame. The current limiting tube is wound with a coil. The left end of the coil is connected with the upper part of a current clutch. The right end of the coil is wound around the lower part of the current clutch. The left end of the coil is connected with the current clutch and further connected with clutch contacts. The clutch contacts are arranged on the front side of the current clutch connected with the coil, and the two clutch contacts correspond to each other in position. The right end of the coil is connected with a joint which is connected with the two poles of the power supply of the electric plate. A magnet is arranged in the current limiting tube, andthe magnet is fixedly connected to right end of the moving rod. When the current of the electric plate reaches a critical value, the safety rod can automatically tighten and contract the electric plate to ensure the safety distance between the electric plate and the circular magnet.