We present Automatic Sack Printing Machine Without Changing Printing Roller, which performs without stoppage due to startup with smooth ink automatically, automatic feeding, automatic correction system, frequency conversion control unwinding and unwinding part, and longitudinal 360o electric alignment. To set bag alignment and length, it has PLC centralized control touch screen. Remote-control unit is provided to control machine's power On/Off. Automatic Sack Printing Machine Without Changing Printing Roller has controlled intelligent, which changes length of the bag without changing plate gears and rollers. Having press printing with automatic clutch, there are no defective products if machine shutdown or turn on.