The surface tension, critical micelle concentration, Krafft point and molecular mean minimum area of the surfactants aqueous solutions were obtained, and some characteristics of the novel surfactant were acquired. 研究了增加氧乙烯基团后表面活性剂的表面张力、临界胶束浓度、Krafft点及表面分子最小平均面积Amin的变化。