Avionics Full Duplex Switched Ethernet (AFDX) introduces virtual link to realize logical separation of physical bandwidth resources.The asynchronous arrival and multiplexing output of data frames may cause the delay jitter of virtual link, which eventually leads to the uncertainty of end-to-end delay analysis of traffic.Aiming at the deterministic problem of AFDX data frame transmission jitter and delay fluctuation, this paper designs an AFDX end system scheduling strategy based on time window, which can effectively reduce the transmission jitter of data frame and provide certainty.The analysis and simulation of the scheduling strategy show that the scheduling strategy can effectively restrict the worst-case jitter of the data transmitter, and improve the certainty and reliability of the whole AFDX network.