Concrete 3D printing system and method

The invention provides a concrete 3D printing system and method. According to the concrete 3D printing system disclosed by the invention, a high-fluidity interface reinforcing material is automatically introduced into 3D printing concrete layers, and the use amount is accurately controlled, so that the interlayer bonding strength is greatly improved, interlayer gaps can be automatically filled and an interface can be wetted by virtue of the leveling property of the high-fluidity interface reinforcing material; the problems that a large-size component is poor in long-time interval wettability and low in interlayer strength are solved. The reinforcing material and the concrete matrix material are separately mixed, so that the original properties of the matrix can be kept, and matching with different matrixes is facilitated. The method has wide applicability to 3D printing of different types of concrete, and has important significance in expanding the application of the concrete 3D printing in the building field