Anti-TPO refers to anti-thyroid peroxidase antibody, and its normal range is generally <60IU/ml, but the value may fluctuate in different hospitals, different regions, and different specificity and sensitivity of different kits, and the specific value needs to be referred to the local regular hospitals. Anti-thyroid peroxidase antibody is a laboratory test for thyroid gland, which has the value of auxiliary diagnosis and therapeutic evaluation. If the test result is positive, it suggests that the patient may have autoimmune thyroid disease, such as Hashimoto's thyroiditis, postpartum thyroiditis and other diseases. It is recommended that patients with abnormal values of anti-thyroid peroxidase antibody should go to the hospital in time.