液体混合物表面张力是很重要的热物性数据之一,但直到目前还没有比较可靠的方法来预计它,多数体系的表面张力是靠实验直接测试的.本文基于表面热力学理论,并应用了溶液的局部浓度理论,建立了一个关联并预计液体混合物表面张力的半理论方程.通过对方程式中的参数估值及对方程的适用性进行检验,结果表明该方程是令人满意的. Surface tension of liquid mixture is one of the important thermophysical data, but until now there is no reliable method to predict it, the surface tension of most systems is directly tested by experiments.This paper based on the theory of surface thermodynamics, and the application of solution Local concentration theory, a semi-theoretical equation is established to correlate and predict the surface tension of a liquid mixture.The test results show that the equation is satisfactory by evaluating the parameters in the equation and the applicability of the equation.