ObjectiveTo develop a patient satisfaction evaluation scale for day surgery and test its reliability and validity, so as to provide a scientific and effective tool for day surgery patient satisfaction assessment.MethodsThe literature review method was used to form an entry pool, and the initial version of the scale was formed in conjunction with the expert review method. And then a preliminary survey was conducted to obtain the tentative version of the scale. Finally, 290 day surgery patients discharged between June 15th and July 15th, 2019 were selected to accomplish a survey to check the reliability and validity of the scale.ResultsFinally, a day surgery patient satisfaction evaluation scale was formed, containing 3 stages (pre-hospital, hospitalization, and postdischarge follow-up), 3 dimensions (medical staff evaluation, medical service evaluation, and environment and process evaluation), and 40 items. After the formal survey, the overall Cronbach’s α coefficient of the scale was 0.980, the Spearman-Brown coefficient was 0.933, the Guttman’s half-coefficient was 0.932, and the content validity was 0.87-1.00.ConclusionThe day surgery patient satisfaction evaluation scale was proven good reliability and validity, which can be used as a measurement tool for day surgery patients and applied to clinical practice.