Objective To study the psychological quality of the soldiers stationed at a reef and their influencing factors, and to analyze the relationship between psychological quality, subjective evaluation of health and social support. Methods A questionnaire survey was conducted on 100 soldiers stationed at a reef using the military psychology quality scale, self-test health rating scale and comprehension social support scale. The military psychology quality scale includes five dimensions:intelligence, loyalty, courage, self-confidence and frustration. The self-test health rating scale includes three dimensions:physical health, mental health, and social health. The comprehension social support scale includes three dimensions:family support, friend support, and other support. The scores of the military psychological quality scale of the soldiers stationed at the reef were compared with the norm of military mental quality using independent-sample t test. Pearson correlation analysis was used to analyze the correlation between scores of each dimension and total scores for the three scales. Multivariate linear regression was used to analyze the influence between social support, healthy subjective evaluation and the psychological quality of soldiers stationed at the reef. Results The scores of dimension confidence (calm+independent+sociable) of the soldiers were significantly better than the overall norm score (P=0.030), and the difference for the other 4 dimensions was not statistically significant between the soldiers and the norm (all P>0.05). Pearson correlation analysis showed that the scores of all dimensions and total scores were positively correlated between the three scales used in this study (all P<0.01), except for loyalty dimension of military psychology quality scale and social health dimension of self-test health rating scale (P=0.366). Multiple linear regression analysis showed that mental health was the influencing factor of the tolerance (P=0.006); family support and physical health were the influencing factors of mental health (P=0.022, P<0.001), and family support was the influencing factor of physical health (P=0.025). Conclusion The psychological quality of soldiers stationed at a reef is vulnerable to the environment of the reef. It is necessary to improve the psychological quality by strengthening social support and improving their own health awareness of the soldiers.