Objective To construct the norm of Myers-Briggs type indicator (MBTI) personality types of naval officers and soldiers, so as to provide basis and reference for their career development and for comparison of different groups. Methods The Chinese version of MBTI-M was used to test the preferences and personality types of naval officers and soldiers of 4 personality dimensions:extraversion (E)-introversion (I), sensing (S)-intuition (N), thinking (T)-feeling (F), and judging (J)-perceiving (P), and to establish norms. Results Naval officers and soldiers generally preferred E (standard score of 0.585±0.213), S (0.636±0.201), T (0.591±0.204) and J (0.676±0.224) in the 4 personality dimensions. There were significant differences in different genders, unit types, identities, work departments, unit properties and arms of services in all the 4 dimensions, except for the differences of different genders in the E-I and S-N dimensions, different identities in the S-N dimension and different unit properties in the S-N dimension (all P<0.05). The dominant personality types were ESTJ (24.4%), ISTJ (11.1%) and INFP (10.1%), and it all showed significant differences among different groups (all P< 0.05). Conclusion The MBTI personality types of naval officers and soldiers tend to be E-S-T-J, especially J, but the overall tendency is not obvious. The dominant personality types are ESTJ, ISTJ and INFP. The norm is affected by general demographic factors, especially by the unit types, work departments and arms of services, but not by gender. Different posts of navy should be adjusted according to different personality characteristics; meanwhile with ESTJ as the reference (best for military personnel), various psychological training should be carried out to consciously revise and develop its auxiliary functions.