The invention relates to an automatic material feeding device. The automatic material feeding device comprises a material inlet mechanism and a pushing advancing mechanism, wherein the pushing advancing mechanism comprises a rotating wheel, the outer wall of the rotating wheel is axially and equidistantly provided with material inlet grooves, the material inlet grooves are internally and movably provided with pushing blocks in a clamped manner, the inner ends of the pushing blocks are connected with the inner walls of the corresponding material inlet grooves through elastic parts, and the parts, at one ends of the corresponding elastic parts, of the pushing blocks are provided with blocking columns; and the material inlet mechanism comprises a material inlet hopper and a connection barrel,the bottom end of the material inlet hopper is connected with the side wall of the connection barrel through a material discharging hopper and communicates with the inner cavity of the connection barrel, one side of the connection barrel is fixedly connected with a spiral hood with the outer end face being in a spiral shape, the connection barrel and the spiral hood are arranged on the part, at one ends of the pushing blocks, of the rotating wheel together in a sleeving manner, and the spiral outer end face of the spiral hood is tangent to the blocking columns. By means of the automatic material feeding device, arranging performed on messy materials can be realized, force storing and releasing of the pushing blocks are realized through rotation of the pushing advancing mechanism, aluminumshells arranged neatly are pushed and fed to a material feeding station, the labor is lightened, and the production efficiency is improved.