The invention discloses an automatic production line of a concrete small component. The automatic production line comprises a maintaining area and a production area, wherein the production area is sequentially provided with a production area, a mold area, a demolding area and a finished product area, and an automatic material distributing and vibration system is arranged in the production area. The principle is as follows that, accurate alignment of the material distributing opening is achieved through an induction device, through the rotation number of a stranding cage and a weighing system of a hopper, the amount of the distributed materials is controlled in a double-control mode, a timing program is set, materials are automatically vibrated after the material distribution is finished, arotating shaft is automatically lifted to push a mold box to move to a forklift mold frame, the mold box is integrally transferred to the maintaining area, the sundries on the surface of the components are cleaned, a vacuum sucker is used for lifting the components to a demolding frame in the whole process, the components are demolded, stacked neatly, packaged and wholly transferred to the finished product area. According to the production line, the line production can be carried out in the production and processing area in batches according to each process, so that the production efficiencyis improved, more steel bench formworks can be set in the same site, the utilization rate of the factory site is improved, and meanwhile the production capacity of a traditional production line is improved.