Objective To know more about the metabolism of HDL-C and LDL-C in the bodies of those people who have normal TC and TG level

to indicate the importance of detection of HDL-C and HDL-C

and consequently to filter out the symptom of abnormal blood-fat.Method According to the item of standard Guide for the Prevention and Cure of Abnormal Blood-fat of Adult Chinese（2007）

1 587 cases with normal TC and TG were selected from 4 021 persons who took part in the activity of healthy inspection.Statistical analysis was done on the selected cases.Results Among the cases with normal TC and TG

6.24% have HDL-C below normal level

12.35% have LDL-C slightly exceeding normal level

1.64% have LDL-C remarkably exceeding normal level

where the three rates for male are 8.82%

16.00% and 2.26% respectively

for female 2.12%

6.54% and 0.65% respectively.male’s is higher than female’s（p<0.01）.The rate of abnormal HDL-C and LDL-C increases obviously when age exceeds 50.Conclusion Normal TC and TG might not indicate suitable fat-metabolism.Both doctors and laboratorians should pay high attention to the detection of HDL-C and LDL-C.