Abstract: According to the traditional semiconductor laser control system in the network, has low control precision, large deviation problem, proposed and designed an automatic control system for the new network of semiconductor laser communication, the hardware of the system includes data display circuit, microprocessor module, signal conversion circuit, power conversion circuit the memory module circuit and a driving circuit unit, through the introduction of the semiconductor laser drive circuit unit, improve the network of semiconductor laser communication control precision automatic control system, gives the design steps of software and source code, and compare the results. The experimental results show that the improved design of semiconductor laser communication automatic control system, control system stability and deviation, are better than the traditional control system, has certain advantages.