Sheet automatic packaging machine DXPZ-300WUsing PLC and touch screen for operation and control, the sealing heating is detected by a temperature sensing module and sent to the PLC for processing and control after analog-to-digital conversion, with high temperature control accuracy. The 5 driving motors are: servo motor drives the reciprocating motion of the heat sealing table, three stepper motors drive the feeding, traction and transverse slicing mechanisms respectively, and the output mechanism is driven by a three-phase asynchronous motor through variable frequency speed regulation to drive the conveyor belt to run. The conveyor belt can be stacked with 5 or 10 pieces intermittently, which brings convenience to the counting of boxes.