Papillary thyroid cancer with cervical lymph node metastasis can have a clinical cure rate of more than 50% with iodine 131 treatment. Papillary thyroid cancer, which is a kind of thyroid tumor with lower malignant degree, is often accompanied by neck lymph node metastasis. For patients with more lymph node metastasis and incomplete resection of the lesions, iodine 131 treatment is needed to further clear the residual cancerous lesions after surgery, and there is usually a 50% clinical cure rate after the treatment. After this treatment, patients need to take the drug Eugenol, which can well prevent the recurrence of tumor, and at the same time can supplement their hypothyroidism caused by surgery. It is recommended that patients consult with the endocrinology department and thyroid surgery department of local hospitals to receive standardized treatment.