Abstract: The critical property(T c)and eccentric factor(ωof liquids were used to calculate the Hildebrand's solubility parameters for 65 solvents at 298.15 K and 323.15 K.In comparison with the reference values,the maximum deviation of the calculated is 7.22% and the average deviation is2.32%.The resucts show that this calculating method can meet the requirement of usual Chemical eng ineering calculation.