Abstract:〔Abstract〕 Objective To investigate the effect of early treatment on pregnancy complicated with hypothyroidism and its influence on pregnancy outcome. Methods A total of 70 patients with hypothyroidism during early pregnancy diagnosed and treated in Zhoukou Maternal and Child Health Hospital from June 2019 to June 2021 were selected and divided into a control group and an observation group according to different treatment periods, with 35 cases in each group. The control group received thyroid function therapy in the second trimester, and the observation group received thyroid function therapy in the first trimester. The efficacy, self-rating anxiety scale (SAS) score, incidence of pregnancy complications and pregnancy outcome were compared between the two groups. Results The level of serum thyroid stimulating hormone (TSH) and SAS score in the observation group were lower than those in the control group after treatment, and the differences were statistically significant (P < 0.05). The incidence of pregnancy complications in observation group was lower than the control group, and the difference was statistically significant (P < 0.05). The preterm birth rate and neonatal asphyxia rate in the observation group were lower than those in the control group, and the difference was statistically significant (P < 0.05). Conclusion Symptomatic treatment for pregnant patients with hypothyroidism in early pregnancy can effectively improve symptoms, promote healthy fetal development, and reduce the risk of anxiety and pregnancy complications.