Abstract: Objective To analyze the predic tive values of the components of metabolic syndrome(MS)on type-diabetes mellitus(T-DM).Methods A cluster sampling method was used to collect local residents elder than 35 years in Lanxi county of Heilongjiang.Data on waist circum ference(WC),blood pressure(BP),triglyceride(TG)and high density lipoprote in(HDL)were obtained through investigation and physical check-ups and analyzed.Results MS,TG and WC were main in fluence factors of T-DM after excluded blood glucose(TG:χ²=18119,P<0.000 1;WC:χ²=10.24,P= 0.001 4).In multi-components of MS,the WC combined with(BP+TG)was a main influence factor of T-DM(χ²= 24.45,P<0.0001).The in teraction analysis showed that WC and other components of MS had positive interaction and synergistic effect on T-DM(P<0.01,S>1)with compounding in series or parallel.The analysis of sensitivity and specificity showed that in the components of MS,the sensitivity and specificity of WC combined with(BP+TG)on T-DM was better than other components with high correct index,PAR P,+LR.There fore,the components were of high predictive values on T-DM.Conclusion In the components of MS,TG and WC are main influence and predictive factors of T-DM after excluding blood glucose.In multi-components of MS,the WC combined with(BP+TG)is a main influence and predictive factor of T-DM.