Abstract: Aiming at a practical Industrial Ethernet system, this paper proposed an effective method for Traffic Modeling. First a link of maximum traffic was selected as a typical one, all packets of different protocols passing through the link is obtained by wireshark, and then the traffic of each protocol can be calculated according to the size and arrival time of packets. It is found that CIP traffic is of relatively smooth periodicity while TCP traffic is of obvious trend after analysis of the characteristics of main protocols traffic (mainly CIP and TCP traffic) by STFT and wavelet transform. Hence, a traffic model using SVR method is proposed due to the different characteristics of the two protocols and verified by libsvm toolbox in Matlab, and the effectiveness of the method is demonstrated by the simulation results.