Objective To probe into the correlation between perfectionism and sense of security in university students.Method A survey of 296university students was conducted using questionnaires like multidimensional perfectionism scale and sense of security scale.Results Differences in total scores on perfectionism between different genders were significant（t=2.723

p<0.01）

and those in the male were higher than the female.Differences in the dimension of parental expectation between different grades were significant（F=4.310

p<0.01）

and there were significant differences between only children and non-only children（t=2.005

p<0.05）.Differences in total scores on sense of security between the only children and non-only children were significant（t=2.457

p<0.05）.Score on dimension of interpersonal security in students from urban area was higher than those from rural area（t=2.270

p<0.05）

and that in the only children was higher than the non-only children（t=2.457

p<0.05）.Perfectionism was negatively correlated with sense of security（r=-0.475

p<0.01）.Concern over mistakes and doubts about actions in perfectionism were negative predictors of sense of security（p<0.05）while logic was a positive predictor of sense of security（p<0.05）.Conclusion In general

perfectionism in university students is negatively correlated with their sense of security.Concern over mistakes

doubts about actions and logic are good predictors of sense of security.