介绍了ＷＯ３电致变色薄膜的变色机理和制备工艺，对ＷＯ３薄膜的电阻率，结构，化学组分，电化学特性和变色性能等特性进行了研究，提出了ＷＯ３薄膜的一种新的锂化方法，这种方法对进一步研制全固态电致变色薄膜器件是十分关键的 The discoloration mechanism and preparation process of WO3 electrochromic film were introduced. The properties of WO3 thin film such as resistivity, structure, chemical composition, electrochemical properties and discoloration properties were studied. A new lithiated Method, this method is further to develop all-solid-state electrochromic thin film devices is very crucial