The invention relates to the technical field of medical detection, in particular to markers for diagnosis, stratification and prognosis of thyroid cancer and applications thereof. The present invention provides markers for thyroid nodules, which include a combination of one or more of the following N-sugar chain markers: CFa, A2Fa, A4G, A4S, A4FOS, A4L, A4E, A4FOE. The present invention also provides a marker for thyroid cancer, which includes a combination of one or more of the following N-sugar chain markers: CFa, A2Fa, A2L, A2GL. The expression levels of the N-sugar chain markers provided by the present invention are significantly different among healthy people, thyroid nodules, thyroid cancer and patients with cervical lymph node metastasis of thyroid cancer, and can be used for the diagnosis of thyroid nodules and the discrimination of benign and evil thyroid tumors , The discrimination of cervical lymph node metastasis of thyroid cancer has high specificity, sensitivity and accuracy.