As the recommended reactor type for fourth-generation nuclear reactors, lead-cooled fast reactors have made remarkable progress. However, lead-bismuth corrosion-resistant structural materials have always been an important factor restricting their development. Previous studies have shown that Fe37 Ni36 Cr10 Al17 multiprinciple component alloys have good static lead-bismuth compatibility. Therefore, with the Fe37 Ni36 Cr10 Al17 alloy as the object, the dynamic corrosion behavior of a 550 ℃ liquid lead-bismuth eutectic with an oxygen content of 10-7 wt.% and a flow rate of 2 m/s was explored, providing a research basis for the application of new Al-containing metallic materials in lead-cooled fast reactors. These results indicate that Al plays a decisive role in the oxide layer. When the alloy indicates the formation of an Al-rich oxide layer, the alloy can be well protected; when the Al content in the oxide layer is low or unevenly distributed, the Fe37 Ni36 Cr10 Al17 alloy undergoes significant dissolution corrosion. Dissolution corrosion mainly occurs in the FCC phase, causing a significant loss of Ni, a decrease in stability, and the precipitation of the dispersed B2 phase. Compared with traditional commercial stainless steel, the Fe37 Ni36 Cr10 Al17 alloy has a shallower dissolution corrosion depth and significant application advantages.