Abstract: The research progress on erosion-corrosion test devices and erosion-corrosion mechanism under fluid jet impingement condition was reviewed. The effects of factors,such as fluid velocity, solid particle, impact angle and flowing model, on erosion corrosion were also summarized and analyzed. Moreover, several problems which should be concerned and investigated in this field were pointed out, and some useful suggestions on erosion-corrosion of metallic materials under fluid jet impingement were proposed.