Abstract: 【Purpose/significance】Exploring the influencing factors of smart wearable device users' privacy information protection be⁃havior from the perspective of privacy fatigue is of great significance to reduce users' privacy fatigue and improve their willingness to protect privacy, so as to promote users' privacy information protection.【Method/process】Based on coping theory and protection motivation theory, this paper constructs the influencing factor model of smart wearable device users' privacy information protection behavior from the perspective of privacy fatigue, and makes a comprehensive study by using structural equation model (SEM) and fuzzy set qualitative comparative analysis (fsQCA).【Result/conclusion】①SEM results show that cognitive factors such as perceived risk, perceived benefit, perceived trust, self-efficacy, response efficacy and response cost significantly affect privacy fatigue; Cognitive factors such as privacy concern, perceived trust, self-efficacy, response efficacy and response cost significantly affect the willingness to
protect privacy; Privacy fatigue has a significant negative impact on privacy protection intention and privacy information protection behavior; Privacy protection intention has a significant positive impact on privacy information protection behavior.②fsQCA results show that there are three configurations that will trigger the privacy information protection behavior of smart wearable device users.【Innovation/limitation】Introduce privacy fatigue into the research of privacy information protection behavior, and comprehensively use SEM and fsQCA methods to explore the complex causal relationship among variables. However, the sample is only for the users of smart watches and bracelets, and the sample range is insufficient.