Objective Iodine deficiency is widely reported in China. However, data is slim in that early pregnancy with a history of thyroid diseases. This study was therefore conducted to assess the iodine nutrition in pregnant women, who were followed up for recovery from various kinds of thyroid diseases. Methods 160 women with previous thyroid diseases were consecutively recruited for early pregnancy without any treatment of medicine and a normal results of blood test of thyroid function, i.e. free thyroxin (FT4), thyrotropin (TSH), thyroglobulin (Tg), thyroglobulin antibody (Tg-Ab) and antimicrosomal antibody (TM-Ab). The urinary iodine (UI) were detected and assessed for testing the iodine nutrition status. Results The median urinary iodine (MUI) concentrations were found to be 52.6μg/L with a range of 14.2～561.3μg/L. Only 7.5% in the group was fond meeting up the WHO standard of >150μg/L. Conclusion The iodine status in pregnant women, who recovered from various kinds of thyroid diseases were fond under WHO standard for pregnant women to some serious degree, which calls for further research for the underline mechanism. Public education is also urgently needed for this population in Shenzhen.