Abstract: OBJECTIVE To investigate the plants of Clematis in Tianmushan national nature reserve, including their species, geographic distribution, resource characteristics, medicinal value, etc. METHODS Using the methods of field investigation, data collection and specimen identification to investigate the plant resources. RESULTS There were 22 species (including 4 varieties) of the genus Clematis, 20 species had medicinal value in Tianmushan national nature reserve, Clematis parviloba Gardn. et Champ. was determined as new record of species in this geographic distribution. CONCLUSION This research provide basis for rational exploitation and utilization of the medicinal resources of Clematis in the national nature reserve.