Objective To investigate the imaging diagnosis of vocal cord paralysis.Methods Of 58 patients,53 cases was unilateral and 5 bilateral.All patients underwent laryngeal tomography and 6 of them underwent CT.The imaging findings were analyzed.Results The tomography findings of unilateral vocal cord paralysis were as follows:dilated piriform sinus,41.5%;asymmetrical vestibule,39.6%;enlarged ventricle,71.7%;thinning cord,47.2%;paralyzed cord higher than intact cord,73.6%;cord fixed in adducent position during inspiration,100%;tilting of the thyroid cartilage,11.3%.The cord fixed in paramedian was the main appearance of bilateral vocal cord paralysis.The CT features of vocal cord paralysis included dilated piriform sinus(6 cases),enlarged laryngeal ventricle(4 cases),fixed cord in paramedian position(4 cases)and tilted anteromedially arytenoid cartilage(5 cases).Conclusion To evaluate the functional abnormality of larynx,tomography is useful and CT is well to display the laryngeal anatomic structures and changes,therefore,if the diagnosis is uncertain by tomography or the intrinsic lesions of larynx is suspected,CT is recommended.