Temporary gravel storage bin

The temporary gravel storage bin comprises a bin body, a feeding port and a discharging port, the feeding port is formed in the top of the bin body, the discharging port is formed in the bottom of the bin body, an installation ring is arranged on the surface of the bin body in a sleeved mode, and supporting rods are fixedly connected to the front side and the rear side of the bottom of the installation ring. Shells are fixedly connected to the front side and the rear side of the bin body, and retention seats are arranged on the two sides of each shell. Through cooperative use of a mounting ring, a supporting rod, a shell, a position fixing seat, a position fixing assembly, a first through opening, a second through opening and a position control assembly, a lifting rod is moved upwards to drive a position control rod and a position control column to move upwards, the position control column drives position control pieces on the two sides to move in the opposite directions, and the position control pieces drive