Abstract: A high efficiency mass analysis technique has been established for the determination of salt content in crude oils. The oil is extracted by 10 ml of the mixture of ethanol/water (1/3, v/v) in a thermostatic shaking table for 3 hours and then detected by coulometric titration method. The test parameters, such as extract time and extract reagent, are optimized. Under the optimal conditions, the recoveries of standard addition in samples are in the range of 98％-101％ with RSDs of (10 times parallel tests) less than 3% and the lower limit of detection is 0.1 ?g/g．Finally，this method is applied to the analysis of salt in real samples and the results compared with that of the method of SY/T 0536 indicate that the relative deviation of the new method is less than 6%.