Purpose/Significance To analyze the technical situation of patent owners in the field of clinical decision support system (CDSS) in China as a whole, so as to provide references for CDSS related technical research. Method/Process Firstly, the CDSS patent data are analyzed from the aspects of application trend, patent disclosure, technology field distribution, etc., then the patentees are divided into different categories, and their technical concerns are analyzed by word frequency and interword vector. Finally, the technology correlation and patent exclusives are analyzed based on the active patentees. Result/Conclusion The number of CDSS patent disclosure shows an overall increasing trend. This field has not formed a technological monopoly in China. Government departments and research institutions should pay attention to the possible financial risks.