In recent years，the number of medical tourists to Korea has been increasing rapidly，of which Chinese medical tourists account for nearly 30%. This study chooses South Korea as a medical tourism destination，and takes Chinese potential tourists without Korean medical tourism experience as an example. The data of 689 valid questionnaires are analyzed. The results showed that China potential tourists to Korea Medical Tourism risk perception is higher as a whole，in addition to tourism performance risk factor，the other 5 factors：medical performance risk factors，medical financial risk factors，tourism financial risk factors，tourism and health risk factors and medical risk factors were significant psychological negative influence on medical tourism expectation. The position of potential demand people can minimize customer risk perception and enhance the potential tourists' expectation value for medical tourism if they can ensure high level of Korean medical service level and services.