Yupingfeng Powder is Zhu Zhenheng's famous prescription, which comes from Danxi Heart Method. It has the effects of benefiting qi, consolidating exterior and stopping sweating. It consists of Radix Astragali, Atractylodis Rhizoma and Radix Saposhnikoviae. This prescription is made of Yupingfeng powder and Ophiopogon japonicus. The experimental results show that this prescription can promote the dna synthesis of spleen lymphocytes in aged mice, delay the aging lesions of lung, liver and spleen, reduce the incidence of spontaneous tumors, and have the functions of enhancing immune function and delaying aging. In the experiment, it was also found that this prescription has the effects of enhancing sod activity in lung tissue of aged mice, increasing the contents of trace elements such as copper and zinc in lung tissue, improving microcirculation and prolonging the life span of houseflies. Clinically, it is suitable for the elderly who are prone to catch a cold due to physical weakness, and has obvious curative effect on preventing and treating upper respiratory tract infection.