The aim of this study was to develop competency indexes assessing nursing postgraduate's tutor in China. Based on Iceberg competency theory, a Delphi survey was carried out. 30 nursing experts in 16 provinces of China were invited to rate the importance of indexes and give some comments on the content. There were 22 experts taking part in two rounds Delphi study. A Kendall's W test also demonstrated experts were well coordinated. During the first round, overall mean scores were high, except for 1 tertiary index. We also added and moved some indexes building on the experts' suggestions. After two rounds, we developed competency indexes appropriate to assess tutots' competencies, consisting of 5 preliminary indexes, 13 secondary indexes and 68 tertiary indexes. The competency indexes were validated and scientific, it can be used to assess tutors in China.