Abstract: Objective : To evaluate the use of color Doppler ultrasound in papillary microcarcino-ma of the thyroid. Methods : The color Doppler images of 48 cases of papillary microcarcinoma of the thyroid with cervical lymph node metastasis were analyzed. Results : Thyroid papillary carcinoma can be diagnosed according to features detected by ultrasound, including the margin, capsule, echogenicity， and microcalcification pattern in the lymph nodes, with an accuracy rate of 72.9%. According to fea-tures of the images, the sonograms were divided into 2 classes: the hypo -echo and hypo -echo halo type. There was a significant difference in the comparison between spicules and cervical lymph node metastasis (P<0.05), and detection of microcalcifications and the extensiveness of the blood supply were found not to be statistically significant factors (ft?0.05) in the two types. Conclusion : Ultrasonography may provide a more accurate diagnosis and may assist the clinician in the decision of whether or not to perform surgery to remove papillary microcarcinoma of the thyroid.