Multimedia Learning System software,real time transmission of streaming media is the key issue.about UDP,the open-loop characteristics ,this text presents a simple TCP-friendly Congestion rate control algorithm UDP and TCP data stream to achieve a peaceful and friendly coexistence.The algorithm will be applied to the transmission of multimedia in teaching module,made a good effect. Multimedia Learning System software,real time transmission of streaming media is the key issue.about UDP,the open-loop characteristics ,this text presents a simple TCP-friendly Congestion rate control algorithm UDP and TCP data stream to achieve a peaceful and friendly coexistence.The algorithm will be applied to the transmission of multimedia in teaching module,made a good effect.