The invention discloses a link delay control-based light load balancing method for a multipath network. In this algorithm model, propagation delay and link bandwidth are simultaneously considered while deciding the optimal path distribution of flow. On the basis of no extra overhead, on one hand, the link delay control-based light load balancing method of the invention could minimize end-to-end delay of the maximum link and reduce waiting delay of reordering data packages at a receiving end, and on other hand, the link delay control-based light load balancing method of the invention could enable the end-to-end delay of each link to be the smallest so as to reduce data package delay variation and reduce risk reordering data packages. The lower the risk of reordering data packages and the smaller the waiting time delay, the smaller the delay brought by a process of reordering data packages. The algorithm model provided by the invention not only could reduce the end-to-end time delay, but also could reduce the time delay for reordering data packages so as to reduce the time of successfully transmitting one data package and optimize the whole throughput capacity of the multipath network.