Over the past decade, there have been an increasing number of studies that have investigated problematic and/or 'addictive' smartphone use. The present study explored the prevalence and correlates of problematic smartphone use (PSU) among Chinese university students. Few studies have investigated relationships between PSU and factors such as academic anxiety, academic procrastination, self-regulation, and subjective wellbeing. The present study proposed and tested a hypothetical model of relationships between PSU and these factors. A total of 475 Chinese university students completed a paper-based survey during class breaks. The survey comprised a battery of psychometric scales translated into Chinese translations examining the study variables (i.e., academic anxiety, academic procrastination, self-regulation, life satisfaction, and PSU). Path analysis was applied to test the hypothetical model. A good model fit was found (CFI = 1.00, RMSEA = 0.008), in which PSU predicted academic procrastination (β = 0.21, p < 0.001) and academic anxiety (β = 0.18, p < 0.01). Also, self-regulation predicted PSU (β = − 0.35, p < 0.001), academic anxiety (β = − 0.29, p < 0.001), academic procrastination (β = 0.23, p < 0.001) and life satisfaction (β = 0.23, p < 0.001). PSU mediated the relationships between self-regulation, and both academic anxiety and academic procrastination. The present study enhances our understanding of the role of problematic smartphone use in relation to academic behaviour, mental health and wellbeing of college students.Keywords Problematic smartphone use . Smartphone addiction . Academic anxiety . Academic procrastination . Self-regulation . Life satisfaction 2015a;Carbonell et al. 2012;Hussain et al. 2017;Lopez-Fernandez et al. 2017). Several symptoms of problematic smartphone use have been identified including excessive reassurance behaviours (e.g. constantly checking for new messages) and use in inappropriate situations such as using smartphones while driving (Billieux et al. 2015a). Furthermore, evidence suggests that problematic smartphone use may be a particular problem in China. For instance, Long et al. (2016) found that the prevalence of problematic smartphone use among undergraduates (n = 1062) in Mainland China (21.3%) was higher than in similar samples in other Asian regions such as South Korea (11.4%) and Taiwan (16.4 to 16.7%). All of these studies used the same instrument (Problematic Cellular Phone Use Questionnaire, PCPUQ, Yen et al. 2009) and the same diagnostic criteria. Explanations for this observed difference remain unclear. Also, several recent Chinese studies have found college students' smartphone use to be associated with poor psychological wellbeing, anxiety and loneliness (Bian and Leung 2015;Huang et al. 2013;Long et al. 2016). Thus, it appears important to investigate whether problematic smartphone use is particularly prevalent among Chinese college students and whether it is associated with negative psychological outcomes for them. The present study was designed...