Abstract: The corrosion behavior of tubing steel in fireflooding field is researched by utilizing HTHP reactor and the corrosion risks have been evaluated according to production characteristics. The results indicate that the temperature, water cut, bottomhole pressure and gas (liquid)?producing capacity of produced fluid in production well by in?situ combustion or fireflooding process are the dominant factors that affect the corrosion rate. The maximal rate appears when temperature reaches 120℃ and water cut at 45%.It is shown that the corrosion rate rises as bottomhole pressure and gas (liquid)?producing capacity rise. When production well reaches a steady phase, the corrosion rate will peak, most possibly causing the corrosion of tubing steel. It is suggested that the anticorrosion strategies should be adopted by selecting suitable materials and adding corrosion inhibitor as well as selectively controlling and reducing corrosion rate in single well