Objective To investigate the clinical and CT features of thymic neuroendocrine tumors. Methods The clinical and CT images of 9 patients with pathologically confirmed NETT were retrospectively analyzed. Results 8 males and 1 female, average age 57.4 years old, no difference on clinical features. Pathology included 5 cases of atypical cancer, 3 cases of small cell carcinoma and 1 cases of large cell carcinoma. CT imaging showed a larger volume of solid mass in the anterior upper mediastinal mass, with the average maximum of 8.6cm, 7 cases with necrosis, and 2 cases with calcification. All lesions were invasive features, 7 cases involving the pleura, and vascular invasion in 3 cases, enhanced scan showed moderate inhomogeneous enhancement, 6 cases of tumor in small vessels strengthen the shadow, 8 cases with mediastinal lymph nodes, 4 cases of metastasis. Conclusion Thymic neuroendocrine tumor often occurred in elderly male patients, it has large volume, easy to necrosis, obvious invasion, uneven enhancement, enhancement of small blood vessels was often seen in the tumors, easy lymph node metastasis and so on, which helps to improve the rate of correct diagnosis of NETT, diagnosis depends on pathological examination.