Objective To observe CT expression for gastrointestinal stromal tumor, and analysis the relationship between features and tumor malignant degree. Methods 60 patients with gastrointestinal stromal tumor treated in the hospital in 2014 January -2014 year in October were selected as the research objects,all were confirmed by postoperative pathological examination and immunohistochemistry confirmed and all patients adopted preoperative CT examination.Then analysis of CT features and discusses the relationship between the CT features such as tumor size, morphology and growth mode between malignant tumor the degree of. Results In the 60 patients, 31 cases was gastric stromal tumor and 19 cases in small intestine, rectum in 7 cases, 3 cases of abdominal mesenteric. In 60 cases there were very low malignant in 22 cases, low grade malignant in 17 cases, moderate in malignant in 16 cases, 5 cases of high grade. The tumor size, shape, contour, growth patterns and necrosis had closed relation with gastrointestinal stromal tumor malignant degree, P<0.05. Conclusion The CT expression for gastrointestinal stromal tumor has certain characteristics, The tumor size, shape, contour, growth patterns and necrosis had closed relation with gastrointestinal stromal tumor malignant degree, so it has important clinical value in the diagnosis .