Objective To develop a spectrophotometric method for the determination of sulfate in salt.Methods After excessive of barium chromate suspension was added to the sample solution， the filtrate contained chromate ions replaced by sulfate and appeared yellow， which could be quantified colorimetrically.Results The method had high precision with the RSD of 0.37%-2.34% （n=7）. And the recoveries was between 98.9% and 101.8% with good accuracy.Conclusion The method is suitable for the batch determination of sulfate content in salt with high precision， good accuracy and easy operation.