The present invention relates to an air pressure utilizatino mode for bill delivery device in the field of finance and can greatly simplify the mechanical structure of bill delivery system. The bill-putting device to main pipeline is the relation ship of several-for-one, it is suitable for delivery by using negative pressure; and the main pipeline to the bill-receiving device is the relationship of one-for-several. It is suitable for delivery by positive pressure. Between the bill-putting device and bill-receiving device, on the main pipeline a positive and negative pressures alternating device is placed, and said device includes (1). negative pressure fan, and (2). positive pressure fan; when it is used, the negative pressure fan is switched on, the bill-delivery barrel is sucked into the positive and negative pressure alternating device. |