Uncoated weathering steel bridges expose to the long-term effect of corrosion during the service, and the main corrosion types that influence its performance are uniform corrosion and pitting corrosion. Pitting corrosion can directly reduce the fatigue strength of steels, and the higher the level of fatigue detail, the more serious the reduction of fatigue strength. Fatigue verification is usually the control index in the design of bridge structure. Thus, the post-corrosion fatigue performance of weathering steel (WS) and high performance steel (HPS) need to be investigated. This study carries out fatigue test on corroded Chinese WS Q345CNH and HPS 70W with a total of 20 specimens. Firstly, the neutral salty spraying dry/wet cyclic corrosion test is carried out for 120 cycles in 35 ℃ according to the ISO code, in which the 5% NaCl solution with pH=6.5 is utilized. Then, the fatigue test results of corroded specimens were compared with those of uncorroded specimens. The result indicates a notable drop in the fatigue strength of corroded WS and HPS.When the guarantee rate is not considered, the fatigue strength of HPS 485W and Q345CNH steel under 2×10⁶ load cycles after corrosion is 27.8% and 26.6% lower than that of the uncorroded specimens, respectively. Considering 95% guarantee rate, when m=3 is adopted, it reduces 34.7% and 50.1%, respectively, and is lower than the FAT 125 requirement. The test also suggests that, the stable rust layers with a certain strength are formed on the surface of both kinds of steel. In addition, the whole fatigue cracks are initiated from the pitting flaws.