Objective To investigate the distribution and clinical characteristics of TCM syndromes in infertility patients with autoimmune thyroiditis(AIT).Methods By referring to the relevant literature on the distribution of TCM syndromes of AIT and infertility in women of childbearing age,the TCM Syndromes Survey of Infertility Patients with Autoimmune Thyroiditis was formulated.256 cases of infertility patients with AIT who underwent in vitro fertilization-embryo transfer(IVF-ET)at the Reproductive Center of The First Affiliated Hospital of University of Science and Technology of China from June 2019 to December 2020 were retrospectively analyzed.The data of basic information,TCM syndromes,basic thyroid-stimulating hormone(TSH),thyroid peroxidase antibody(TPO-Ab)and thyroglobulin antibody(TG-Ab)were collected.By means of frequency analysis and systematic cluster analysis,the distribution regularity of TCM syndromes in infertility patients with AIT were concluded.Results After analysis,the following 5 common syndrome elements were obtained,namely,qi deficiency,liver depression,spleen deficiency,kidney deficiency and blood stasis.In addition,it was concluded that this disease was more common in complex syndromes.Through systematic clustering analysis,main TCM syndromes of this disease were obtained,which were qi deficiency and liver depression syndrome(69 cases,26.9%),spleen and kidney deficiency syndrome(45 cases,17.6%),spleen qi deficiency syndrome(38 cases,14.8%),qi deficiency and blood stasis syndrome(36 cases,14.1%),kidney deficiency and liver depression syndrome(32 cases,12.5%)and other syndrome types(36 cases,14.1%).The basic TSH level was higher in patients with qi deficiency and liver depression syndrome,spleen qi deficiency syndrome,qi deficiency and blood stasis syndrome than other syndrome types,with statistical significance(P<0.05).There was no significant difference in TPO-Ab and TG-Ab titers among different syndromes(P>0.05).Conclusion TCM syndromes of infertility patients with AIT can be clustered into qi deficiency and liver depression syndrome,spleen and kidney deficiency syndrome,spleen qi deficiency syndrome,qi deficiency and blood stasis syndrome,kidney deficiency and liver depression syndrome and other syndrome.The main element of syndrome is qi deficiency,and the pathological sites involved spleen,kidney and liver.Stasis blood is a main pathological product.It is required to pay close attention to the thyroid function in AIT patients with qi deficiency.