Concrete aggregate bin capable of automatically screening aggregate

The utility model discloses a concrete aggregate bin capable of automatically screening, which comprises a storage bin, the storage bin is provided with a feed hopper, and a first support frame and a driving mechanism for driving the first support frame to rotate are rotatably connected in the storage bin; a second supporting frame is slidably connected to the upper end face of the first supporting frame, transmission mechanisms are arranged on the two sides of the first supporting frame, each transmission mechanism comprises a crank and a connecting rod, a rotating rod is rotatably connected into the first supporting frame, the two ends, in the length direction, of the rotating rod penetrate through the first supporting frame and are fixedly connected with the corresponding cranks, and the cranks are rotatably connected with the corresponding connecting rods; the two connecting rods are rotationally connected with the second supporting frame, the first supporting frame is fixedly connected with a first motor