Abstract: On the basis of the generalized cubic equation of state proposed by Abbott, the author put forward a two parameter cubic equation of state which is universally suitable for fluids.Within the range of Pr = 0-30, and T = 0.5-15,when the new equation of state was tested on 400 data points, 90.5% of the points has an error of less than 4%.Comparea to other two-parameter equations of state, the new equation has the advantage of accuracy and simplicity.