Bridge drainage pipeline with anti-blocking structure

The utility model discloses a bridge drainage pipeline with an anti-blocking structure, which comprises a main pipeline, a cover plate is arranged above the main pipeline, a filter screen is arranged on the inner wall of the main pipeline, an opening is arranged on the opposite side wall of the main pipeline above the filter screen, an impurity storage box is arranged on the side wall of the main pipeline on the outer side of the opening, and an anti-blocking structure is arranged in the impurity storage box. A groove is formed in the side wall, away from the main pipeline, of the impurity storage box in the vertical direction, a horizontal plate attached to the inner wall of the impurity storage box is slidably inserted into the groove in a matched mode, a partition plate matched with the opening is rotationally arranged on the side, close to the main pipeline, of the lower portion of the horizontal plate, and a spring is connected between the partition plate and the horizontal plate; a drag hook is fixedly