The utility model discloses a novel water stopping bolt. The novel water stopping bolt comprises a casing pipe; peripheries at two ends of the casing pipe are upward provided with expand heads; two ends of the casing pipe are respectively in thread connection with adapters; the middle of the casing pipe is provided with a water stopping piece; a middle position of the casing pipe is internally provided with hydrophilic expansion water stopping materials; positions inside the casing pipe, which are arranged at two ends of the hydrophilic expansion water stopping materials are provided with end sockets. The novel water stopping bolt has the advantages of being simple in structure, saves materials, convenient and energy-saving to detach and install, shortening the construction time, saving construction costs and enabling disposable reinforcement screw rods which are expensive in price to be recycled.