Objective: To analyze various CT, MRI and ultrasound features and its values in diagnosis and surgical therapy of lingual squamous cell carcinoma.Methods: After searching through the pathology data bases in our hospital, we included 47 patients with lingual squamous cell carcinoma confirmed by pathology, then analyzed those CT, MRI and ultrasound features with clinical feature and pathologic data.Results: Among 47 cases, mass located in lateral margin of tongue (n=34), dorsal of tongue (n=l), root of tongue (n=l 1) ,tip of tongue (n=3), CT showed different density of the mass, after enchancement the mass showed hetergeneous high density.MRI showed clearly confine of the mass,after enchancement the mass showed heterogeneous high signal intensity.Metastasis neck lymph nodes could be seen enlarged with central necrosis and cytogenetic degeneration in CT and MRI.Ultrosound showed hilus could be seen unclear, and heterogeneous high signal intensity and capsule incomplete.The ultrasound (83.3％) was superior to CT (70.2％) and MRI (65.1％) in accurate evaluation of neck lymph nodes metastasis.Conclusion, MRI are useful for judging invasive depth, integrity of lingual septum of and involvement of tongue and mouth floor muscles.CT are helpful for judging tongue cancer breaking through mandible, and also to guide clinical treatment.Ultrasound should be first choice for diagnosis of neck lymph nodes metastasis.