Abstract: In view of the traditional TCP control protocol used in the limitations of heterogeneous network, the congestion window optimization TCP control strategy is proposed. The control strategy carries the logarithmic function to dynamically adjust the congestion window's changes in congestion avoidance phase. when the transmitting terminal receives 3 times of repetitive ACK or timeout in a row, adjust the congestion window reasonably according to the current network bandwidth.Simulation results show that the control strategy increases the throughput and improves the network performance compared with the traditional TCP control strategy in different network environment.