Abstract: Objective To study stage eliminating IDD in Yimeng Mountainous Area.Methods A nalysing all epidemic investigating and prevention datum,hunting the effective measure to stage eliminating IDD.Results The average rate of goitre is 101 94% before prevention and cure in Linyi city.The aver age rate of goitre is 54.98% in infants aged 7-14,the chroma of urine iodin is among 23.9-32.2μg/g Cr in denizen,fountain content iodin is 0-6.96μg/L,the siken rate and fountain content iodin is bear cor relation r=0.712 8,P<0.05;The rate of eligibility iodized salt raise from 72.72% to 90.85%,children IDD falls from 37.70% to 6.12% and the chr oma of urine iodin raise from 35.23μg/g Cr to 249135μg/L since the whole civilian used iodized salt from 1980 to 1999,emphases confluence total take idized oil 4 212 374 person times from 1994 to 1996,average rate is 4.1%; 426 shares umbilical cord blood average TSH is 3.86%,standard deviation is 2.26,overrun 5mU/L occupies 4.23%;the rate of public know ing prenvention and cure common sense raise from 70.14% in 1985 to 91.49% in 1998.Conclusion Carrying out colligate prevention and cure step,based continuance mechanism of prevention and cure IDD is manipulable to keep eliminating IDD for long time in a biggish area.