In order to obtain the quantitive ultrasound(QUS)reference data of normal people in China,especially in inland area,we analyzed QUS of 1892 normal people of 8~78 years in Taiyuan area. The results indicate a striking difference between the age and SOS (P<0. 05). SOS peaks in 30~40 years of ageand declines after 40 years of age,especially in females.