In order to overcome the shortcomings of currently used flow control methods for information transmission in substation， the information transmission strategy based on class-based weighted fair queuing（CBWFQ） and weighted random early detection（WRED） is proposed. The weighted transmission factor of information is calculated by the fuzzy analytic hierarchy process（FAHP） and the minimum bandwidth and discarding possibility are divided to satisfy the requirement of information quality of service（QoS）. Network simulation is employed to verify the performance of the strategy proposed and the results indicate the validity of this strategy.