The invention discloses a printing method and device. The method comprises acquiring a vector graph file; identifying a first vector graph source contained in the vector graph file; Judging whether there is overlap between the first vector map sources, and fusing the overlapped first vector map sources to obtain at least one second vector map source; generating a print trajectory from at least oneof the second vector map sources; printing low melt point metal with a melting point not higher than 300 DEG C on the surface of the printed substrate according to the printing trajectory to form a printed circuit. By re-integrating the vector drawing source before generating the printing track, the invention avoids the problems such as scratching and overflowing of the low-melting-point metal ofthe solid state at normal temperature and the liquid state at normal temperature during/after the printing process, and guarantees the printing quality of the printed circuit.