Water guide trash holding structure for urban flood control

The utility model belongs to the technical field of urban flood control, and particularly discloses a water guide trash holding structure for urban flood control, which comprises a sewer wellhead, limiting seats are fixedly arranged on two sides of the top end of the sewer wellhead, a water leakage cover plate is fixedly arranged at the tops of the limiting seats, and an impurity removal mechanismis fixedly arranged in the middle of the interior of the sewer wellhead and is in threaded connection with the water leakage cover plate; the impurity removing plate which is elastically connected through the spring and can slide up and down on the hollow stud is additionally arranged on the hollow stud, so that the opening and closing size of a sewer mouth can be automatically controlled throughthe size of water flow during drainage, meanwhile, a water leakage hole in the water leakage cover plate can be dredged through the resilience force of the spring, and flood drainage is prevented from being affected by blocki