A series of stearic ethanolamide polyoxyethylene ether glucopyranoside with different polymerization degree(n) of epoxyethane (EO) were synthesized .The structure of the products were characterized by IR and 1HNMR .Surface physicochemical properties of these products were measured .The results showed that surface tension (γcmc) varied from 30~38mN∕m and critical micelle concentration (CMC) varied from 1×10-5~10×10-5g∕ml. The relationship between surface physicochemical properties of products and polymerization degree of EO were studied systematically. The application properties such as emulsifying power(with turpentine)、foaming ability、hard water stability、absorbing and keeping moisture rate improved with the increase n of EO.