The utility model discloses a safety ring protects water conservancy device, including plugboard, bottom plate and internal support column, the one end at the bottom plate is fixed to the plugboard, the one end welding that the plugboard deviates from the bottom plate has fastening bolt, and fastening bolt's outer skin weld has a barb, be provided with the stock that runs through in the plugboardon the plugboard, and contact department of stock and plugboard up end is fixed with the backing plate, the drainage dog is installed to bottom plate upper end, and the intermediate position of drainage dog is provided with the clearance hook plate, the both sides welding of clearance hook plate has the pull rod, the inside upper end of drainage dog is equipped with the second spout hole, internalsupport column fixes the one end that deviates from the plugboard at the bottom plate, the internal support column upper end is equipped with first spout hole with the corresponding position department of second spout hole. The utility model discloses a setting of drainage dog, clearance hook plate and plugboard makes it have floater clearance, flood impact guide and the firm characteristics of connecting, has reached flood emergency treatment's effect.