Abstract: Plasma VLDL content had genetic speaciality in different duck specs.The female duck VLDL content during laving pened was 4.48-17.65 times higher than that of male duck.The higher egg-laying rate the female duck had, the higher content and lower coefficient of variability the plasma VLDL was.There were active Correlations between VLDL content with body weigh and fat rate,and negative correlation with lean rate in 7-week-old meat duck.