Objective To analyze the application value of ultrasound, CT alone and the combined detection in the clinical staging of ovarian primary malignant tumors. Methods 80 patients with primary ovarian malignant tumors treated in our hospital from February 2013 to February 2015 were treated as the research objects. All of them underwent ultrasound and CT imaging examination. Compared with the results of surgical and pathological staging, the accuracy rates of ultrasound and CT alone and their combination in the diagnosis of the clinical staging of malignant tumors were analyzed. Results Surgical pathological staging showed that there were stage I 21cases, stage II 17 cases, stage III 37 cases and stage IV 5 cases. Taking this as the control standard, the accuracy rates of ultrasound, CT alone and their combination in the diagnosis of clinical staging of ovarian primary malignant tumors were 72.5%, 82.5% and 91.3% respectively. The diagnostic accuracy rate of ultrasound combined with CT was significantly higher than that of ultrasound (P<0.01). Conclusion The accuracy rate of ultrasound combined with CT in the diagnosis of clinical staging of ovarian primary malignant tumors was the highest, followed by CT and in clinic, the combined detection is recommended