Method for improving utilization efficiency of NAT address pool resource and device thereof

The invention discloses a method for improving utilization efficiency of NAT address pool resource and a corresponding device, which are applied for network equipment, wherein a plurality of business boards are allocated to one aggregation group which is configured with same NAT address pool resources. The method comprises the steps of: receiving a forward message, extracting a destination IP address in the forward message, scheduling the forward message to a business board with a NAT function according to the destination IP address for processing; and receiving a backward message, extracting a source IP address in the backward message, and scheduling the backward message to the business board with the NAT function according to the source IP address for processing, wherein when the source IP of the backward message is same with the destination IP of the forward message, the forward message and the backward message are processed in a same business board. According to the method of the invention, through configuring same NAT address pool resources on all business boards in one aggregation group, sharing for the NAT address pool resource is realized.