Abstract: Objective: Analysis of left ventricular ejection time and correlated factors in Han and Korean-Chinese ethnics of Heilongjiang Provence. Methods: Left ventricular ejection time (LVET), accelerate index (ACI), pre-ejection period (PEP), stroke time ratio (STR) and other parameters were obtained by BIOZ Cardio Dynamics Monitor. Data were analyzed by SPSS 15.0 soft ware. Results: LVET in Korean-Chinese was shorter than in Han. According to standard coefficients, LVET was effected by stroke volume index (SI), STR, stroke volume (SV), ACI, PEP, systemic vascular resistance index（SVRI）, AGE, body mass index(BMI), cardiac output(CO), systolic blood pressure(SBP), diastolic blood pressure(DBP), and gender from strong to weak respectively. The influence extent to the difference of LVET between Han and Korean-Chinese were STR(-20%), systemic vascular resistance(SVR)(-40%), SVRI(-20%), SBP(-20%), DBP (-20%), SV(-160%), SV+HR(-140%), SI+HR(-140%), CO+HR(-140%) and cardiac output index(CI)+HR(-140%) by single factor linear regression. Conclusion: Relative shorter LVET in Korean-Chinese may be result from their relative higher SVR and blood pressure and may be result in relative lower SV at meantime.