The sampling survey for iodine content of iodized salt was conducted in 36 food and nutrition surveillance sites of CFNSS in 1998 in China, which covered 26 provinces, 362 portions of salt samples. The average compliance rate was 76.0%, 83.2% in Urban area and 71.9% in Rural. Iodine content of salt less then 20 mg/kg at the rural households was 20.4%, and 9.9% in urban.