Objective To explore the application effect of dual source CT dual energy technique in the detection of extremities of gout patients. Methods A total of 29 gout patients (study group) treated in our hospital from May 2013 to June 2015 and 30 healthy volunteers (control group) in the same period were selected as the research objects, all research objects underwent dual source CT dual energy scanning in joints, dual energy CT decomposition method was used to process pictures, results were positive or negative according to whether there was uric acid salt deposits or not in joints of extremities, differences in uric acid salt deposits and uric acid salt deposits site detected by double source dual energy CT in the two groups were observed and compared. Results Positive rate of uric acid salt crystal examination after double source dual energy CT scanning in study group was significantly higher than control group (P<0.05). 25 cases of gout patients by dual energy CT scan showed urate deposition in the clinical diagnosis of nodules can be detected in patients with gout nodules, but in clinical examination of 4 patients found no gout nodules, but 3 were detected urate crystal deposited by dual energy CT scan, detection rate the detection rate is as high as 96.55%, examination diagnosed gout nodules significantly higher number of dual energy CT examination of the number of uric acid deposition nodules lesion. Conclusion Application effect of dual source CT dual energy technique in the detection of joints of extremities uric acid salt deposits in gout patients is high, and it is worthy of clinical application.