Path load balancing method and system

The invention relates to the technical field of data streams, in particular to a path load balancing method and system. The method comprises the following steps: firstly, calculating the residual bandwidth of each pre-selected path, and then selecting a target path from each pre-selected path according to the size of the residual bandwidth. And when the newly arrived current data packet to be transmitted is different from the data packet transmitted at the previous moment, the current data packet to be transmitted is transmitted in the new target path instead of being transmitted by using the historical path. According to the invention, one path is selected to transmit the new data packet to be transmitted currently according to the residual bandwidth of each path, so that the load balancing of each path is realized. Moreover, according to the invention, a transmission path is not reselected for each data packet, but a new target path is only selected for the current to-be-transmitted data packet different fr