Abstract: In the network system of distributed data exchange, the exchange of massive data is a key problem. I}he employcd hop and time delay arc consided during a routing selection, and there is not QoS guarantee. The data packages in the transmission process are delayed a long time for obstruction or interrupt, and some of them are discarded for seriously delay. In this paper, the model of data mail QoS based on improved ant colony algorithms realizes the data mailing with satisfaction of QoS routing, load balance and efficiency.

Key words: Distributed system, Ant colony algorithm, Data mail, QoS routing