In conservation of iron cultural relics , desalination is one of very important treatment. Generally , the de- salination solution is alkaline. In this study , the influence of various factors , such as pH value ,in alkaline desalina- tion solutions,on the chloride specific ion electrode were examined. These experiments showed that the pH value of the desalination solution affects the potential of chloride specific ion electrode , especially when the chloride ion con- centration is low. The optimal pH of the solution is between 2 and 7. The surfactant in the solution had no significant impact on the chloride specific ion electrode ,as seen in the fact that the potential value of the l# chloride standard solution( 0. 5 mol/L NaOH + 1. 5% DP - 105 ) was equal of that of 2# solution (0. 5 mol/L NaOH) . However, bothof them were higher than the potential value of 3# solution ( aqueous solution) . In practice , the components of chlo- ride ion standard solution should be the same as that of the solution to be tested. Using chloride ion standard solu- tions ,it was showed that when chloride ion concentration is between o and 200 mg/L , the standard curve was highly linear , reproducible , and precise , and had a high correlation coefficient.