Bridge drain hole grate

The utility model discloses a bridge drain hole grate, and mainly relates to the field of drain hole protection. Comprising a limiting ring and a U-shaped groove, the limiting ring is fixedly connected with the opening end of the U-shaped groove, a through hole is formed in the inner wall of the U-shaped groove, and the limiting ring makes contact with the periphery of the drainage hole. The water drainage device has the advantages that the water drainage device can avoid the situation that water is accumulated on the road surface due to the fact that the water drainage holes are blocked by garbage, and the water drainage device is made of PP materials, so that the service life of the water drainage device in the environment is prolonged, and damage caused by exposure to the sun, corrosion and the like is reduced. And through holes are formed in the inner wall of the U-shaped groove of the device, and the through holes play a role in filtering and collecting the garbage. And due to the existence of the connec