Objective To compare and analyze the imaging findings of ultrasound and CT and their value in the diagnosis of abdominal solid organ closed trauma. Methods One hundred cases of patients with abdominal solid organ closed trauma confirmed by operation and pathology in our hospital between January 2014 and December 2015 were selected as the study object. All patients underwent ultrasound and CT examination on admission. Their imaging findings were observed. The results of operation and pathology were taken as the contrast to compare the coincidence rates of ultrasound and CT in the diagnosis of abdominal solid organ closed trauma. Results Operation and pathology confirmed that there were 118 closed injuries of abdominal solid organs and 28 of them were multiple organ injuries. The operative and pathological results were taken as control. The coincidence rates of CT in diagnosis of splenic injury and multiple organ injury and the total coincidence rate (89.28%, 100.00%, 90.68%) were significantly higher than those of ultrasound (71.43%, 85.71%, 80.51%) (P<0.05). The coincidence rate of ultrasound in the diagnosis of liver injury and renal injury were 85.36% and 95.24% respectively while those of CT were 90.24% and 95.24% respectively (P>0.05). The characteristics of abdominal solid organ closed trauma were enlarged volume of the injured organs and inhomogeneous echo. CT findings were enlarged volume of injured organs, inhomogeneous density shadows. After enhanced scan, it become more obvious. Conclusion The accuracy rate of ultrasound in the diagnosis of abdominal liver and kidney injuries is similar to CT but CT is superior in the diagnosis of multiple organ injury and spleen injury.