Abstract: ObjectiveTo discuss relation of iodine nutrition of infant and lactation.MethodUrinary iodine between lactating womam and its infant were paired off and were analyzed by correlation and regression analysis;Urinary iodine was measured by ammonium persulfate digestion-arsenic cerium catalysis spectrophotoemtry.ResultsUrianry iodine between lactating woman and infant correlated markedly,correlation coefficient(r)was respectively 0.344(P<0.01)in 179 pairs on 0~14 month infants and 0.524(P<0.01)in 97 pairs on 0~7 month infant;regression equation was respectively ŷ=214.20+0.677x and ŷ=136.517+1.178x.Correlation coefficient(r)was statistically significantin 0 month~,4 month ~group infant.ConclusionUrinary iodine between lactating woman and infantis better correlation in 0 month~,4 month ~group infants,correlation coefficient(r)descended with the aging of infant.