Purpose: A proper mental health scale is developed for undergraduate students.Methods: exploratory and confirmatory factor analytic approaches are adopted to evaluate the intra-structure of the scale.Results:(1) exploratory analysis shows that the scale has nine factors,explaining 52.88% of the total variation.(2) The Cronbach's α coefficient,split-half and test-retest correlation coefficients are 0.95,0.93,and 0.83 respectively.(3) The confirmatory analysis shows that the fit indexes for x~2/df,AGFI,CFI,TLI,RMSEA,RMR are 2.94,0.87,0.86,0.88,0.87,0.04,0.05.Conclusions: The scale has achieved internal consistency reliability and validity.