Objectives To observethe relationship between Thyroid Hormone (TH) leveland blood lipid level in the healthy elderly with therapyof small dose of TH. Methods A total of 120healthy old persons were randomly divided into twogroups: 60 old persons as treatment group and other 60persons as control group. Each person in the treatmentgroup took a thyroid tablet 10 mg daily continuously forsix months while the control group took VitB1 30 mgdaily instead of thyroid tablet. The level of TH, M -TSH, FT3, FT4, TT4, rT3, TC, TG, LDL- C, HDL-C, ApoA1 were measured in two groups before andafter receiving TH or Vit. B1 treatment. Results Inthe treatment group the level of TH increased obvious-ly. And TC, TG, LDL- C levels decreased also tosome extent while HDL- C, ApoA1 levels increasedslightly which was significant when compared with thecontrol group and pre- treatment group. ConclusionsTo use small dose of TH as supplement treatmentcan increase the TH level of healthy old persons anddecrease their blood lipid level. It would be a benefitfor treating hyperlipidemia in the elderly.