This study establishes the evaluation index system of the quality of passenger transport service of highspeed rail based on the characteristics of passenger transport and determines the index weights with the Fuzzy Analytic Hierarchy Process. In order to make up for the deficiencies of present quality evaluation method of passenger transport service of high-speed rail, this study develops the multi-level extensible synthetic evaluation model of the quality of passenger transport service of high-speed rail with the core of extension method based on the questionnaire survey to the passengers. This study tests the model with the data surveyed in a passenger station of high-speed rail, which can not only expand extension application areas, but also provide new ideas and means for the evaluation of the quality of passenger transport service of high-speed rail.