The utility model discloses a portable 3D printing device, including X to transmission, Y to transmission and Z to transmission and printhead assembly, X passes through the connecting plate to transmission to be fixed on Y is to transmission, Y passes through the connecting plate to transmission to be fixed on Z is to transmission, printhead assembly sets up on X is to transmission, the last screwpropulsion leaf of printhead assembly sets up in the hopper, and the end connection of screw propulsion leaf has the rotating electrical machines, and the feed inlet setting is at the top of hopper,and the conveying pipeline of fixing on driven displacement device is connected with the feed inlet. The utility model provides a pair of portable 3D printing device, but wide application in the 3D ofmember factory or job site member and the printing of house entity, its simple structure, it is with low costs, adopt the assembled design theory of fixed mould piece, make things convenient for assembly and disassembly, both shortened equipment time of putting up and conveying efficiency, guaranteed to print the stability that printer head was beaten to the in -process again.