Abstract: An active queue management (AQM) algorithm based on global sliding mode control was designed to cancel the arrival stage of sliding mode control so as to solve the problem of dynamic TCP network congestion with inputs restricted, thus ensuring the robustness of network system in the whole control process. The algorithm shows its good transient/steady state responses in TCP/IP networks, such as modeling uncertainties, fluctuation of time-varying parameters and network jittering due to non-TCP sessions. Simulation results revealed that this method enables the queue length to converge at its set value quickly with the queue fluctuation kept low. In particular, the algorithm proposed outperforms the conventional PI control and sliding mode control if the network conditions are changed.