Abstract: A superhydrophilic heat transfer surface was formed by a special nano-material coating process. The enhanced heat transfer characteristics and enhanced heat transfer mechanism of water jet boiling on the superhydrophilic surface was investigated and the jet boiling characteristics on the superhydrophilic surface was compared with those on the common metal heat transfer surface. The quantitative effects of flow condition, heating mode, heating condition and superhydrophilic coating process on critical heat flux (CHF) were studied and enhanced heat transfer characteristics in the nucleate boiling regime were confirmed. The heat transfer characteristics of jet boiling on the superhydrophilic surface were summarized with semi-theoretical, semi-empirical correlations.