A TRUNK dispensing method relates to packet switching chip comprising following steps: 1. after the packet switching chip receives, the packet receiving analysis module performs matching analysis for packet sequence attribute according to matching rule; 2. the packet buffer module computes congestion degree of every transmitting subport; 3. forwarding engine module decides routing for transmitting subport according to 1 and 2; if packet flow needs to forward according to received time sequence, selecting transmitting subport corresponding to HASH value of the packet for forwarding; if packet flow does not need to forward according to received time sequence, selecting transmitting subport of minimum accumulation value according to congestion information for forwarding. The TRUNK dispensingmethod of the invention considers particularity of both dispensing voice and video chat service and pure data service, can fully utilizes bandwidth of every subport, solve problem to a certain degreeof optimized use for outlet bandwidth.