Concrete processing stock bin with dust falling function

The utility model relates to the technical field of concrete processing, in particular to a concrete processing stock bin with a dust falling function, which comprises a stock bin main body, a conical opening is fixedly mounted at the top of the stock bin main body, a cover plate is movably mounted at the top of the conical opening, a motor is fixedly mounted on one side of the stock bin main body, and a dust falling opening is formed in the other side of the stock bin main body. And a conveying screw rod and a limiting mechanism are rotationally mounted in the stock bin body, the limiting mechanism comprises a mounting frame and a movable rod, and the mounting frame is fixedly mounted on one side of the conical opening. Through mutual cooperation of the water pump, the water tank, the annular water pipe and the spray head, water in the water tank can be pumped out through the water pump, the pumped water can be introduced into the annular water pipe through the communicating pipe, the interior of the stock b