The invention provides an improved printing machine, which can freely select a processing method according to the requirement and has wide applicable range and strong impromptu performance and randomness; furthermore, the invention can realize the printing process requirement of small batches and various types with lower production cost. The invention comprises a multi-working position workbench,the rotation driving structure of the multi-working position workbench, and a screen frame; the screen frame is arranged on a supporting frame. The invention is characterized in that the invention also comprises an ink-jet printing head which is arranged on the supporting frame; the ink-jet printing head, the screen frame and the rotation driving structure can be electrically connected by a PLC.