Abstract: Due to the serious corrosion environment, numerous influencing factors of corrosion and complicated corrosion mechanism in Luliang Oilfield, it is difficult to accurately establish a mathematics prediction model for its production system, The indoor weight-loss method was employed in the dynamic simulation experiment, Then, the corrosion rate was chosen as the main factors of corrosion, while 7 parameters such as content of Cl^-, HCO₃^-, Ca²⁺, Mg²⁺, SO₄^2- pH value in the produced fluid and environmental temperature of production system and so on were chosen as the sub-factors of corrosion, In order to determine the effect of those 7 sub-factors on the corrosion performance of N80 casing and #20 low-carbon steel used in gathering pipeline of Luliang Oilfield, the sequence of influence factors for those 7 sub-factors was analyzed using grey relational analysis method.Results demonstrated that the significant sequence of influence for those 7 sub-factors was environmental temperature and pH value of the produced fluid.