The invention relates to an intelligent 3D printer with high printing precision. The intelligent 3D printer comprises a base, a controller, a printing platform, a top plate, a lifting plate, a plane moving mechanism, a printing mechanism and two lifting units; the printing mechanism comprises a material disc, a wire feeding
pipe, a heating device, a first flow
pipe, a flow guide box, a second flow
pipe and a printing head, wherein a flow guide mechanism is arranged in the flow guide box and comprises a second driving motor, a first connecting rod, a second connecting rod, a
piston, a flow guide cylinder, a blocking mechanism and two third flow pipes; and a heating mechanism is arranged in the controller and comprises a heating unit and two translation units. According to the intelligent 3D printer with the high printing precision, the translation units are used for driving the heating unit to move to preheat the printing platform in sequence, the
electric energy consumption is reduced, and the energy-saving effect is achieved; and moreover, and the material
extrusion amount of the printing head is guaranteed each time through the flow guide mechanism, so that the heights of printing
layers are equal, and then the precision of a printed sample and the practicability of equipment are improved.