Objective:To develop and test the validity and reliability of the Urban Psychological Integration Scale for Migrant Workers(UPISMW).Methods:The theoretical framework was determined,and the initial scale was established by expert scoring method and predictive test.Totally 887 migrant workers who had worked in cities for more than 6 months were selected and randomly divided into 2 parts.Sample 1(n=468) was used for item analysis and exploratory factor analysis.Sample 2(n=427) was used for confirmatory factor analysis,convergence validity and discriminant validity analysis,and 50 migrant workers were randomly selected from the total sample for3-week retest.Another 167 migrant workers were selected for scale validity test,and the Life Satisfaction Scale(LSS) and Multi-ethnic Identity Scale(MEIM-R) were used as scale validity tools.Results:The UPISMW consists of 9 items,including 3 factors of identity,social identity and social perception.The content validity index of the scale and the items were all above 0.9,and the total variation of the three factors was 66.94%.The model fit was good(χ~2/DF=1.916,RMSEA=0.049,RMR=0.024,GFI=0.976,AGFI=0.952,CFI=0.980,IFI=0.980),STD of all three factors were above 0.6.AVE were all greater than 0.5,and the 95% confidence interval of correlation coefficient did not include 1.The total score of the scale and the scores of the three factors were significantly positively correlated with LSS and GSES(ICC=0.56-0.77).The Cronbach a coefficients of the total scale and the three factors were 0.83,0.79,0.74 and 0.74.The constituent reliabilities(CR) were 0.75,0.77,and 0.75.The retest reliabilities were 0.98,0.95,0.93,and 0.96.Conclusion:The Urban Psychological Integration Scale for Migrant Workers(UPISMW) shows good validity and reliability. [ABSTRACT FROM AUTHOR]