Huge amounts of data under the environment of large ISP network traffic explosive growth due to network congestion, the current network traffic unloading method through forecasting to uninstall the network traffic, uninstall the accuracy is low, poor quality of service.For this, put forward a new kind of huge amounts of data under the environment of large ISP network flow discharge method, through the maximum entropy method, based on the semantic information in the collection and traffic flow type for identification.Based on mass data environment of large ISP network traffic source node position relations, through the graph theory method to determine the best route of transmission, realize to unload large ISP network traffic.Based on the principles of relay node number and total discharge time at least, by Dijkstra method of mass data environment best uninstall route for solving large ISP network traffic.Experimental results show that the proposed method to unload large ISP network traffic, not only the flow type, high accuracy and high discharge rate, the high quality of service.