Automatic concrete 3D printing device

The automatic concrete 3D printing device comprises a bearing frame, a temporary storage barrel is movably connected to the bearing frame, an inner cavity used for temporarily containing cement is formed in the temporary storage barrel, and a stirring shaft driven by an external motor is rotationally connected into the temporary storage barrel; a discharging port with a concrete extrusion pump is formed in the bottom of the temporary storage barrel, a printing nozzle is installed at the end of the discharging port, and a conveying device used for conveying materials into the temporary storage barrel is installed on the bearing frame. The concrete 3D printing molding device is simple in structure and convenient to assemble and use, concrete raw materials can be continuously sheared to keep material fluidity, the concrete materials are effectively prevented from being condensed in the discharging process and flowing deformation after being discharged, and the molding effect of concrete 3D printing finished prod