Objective:To compare the value of color Doppler ultrasound(CDU),DSA,CTA and MRA in the detection of the tramatic femoral pseudoaneurysm(PA) of rabbit.Methods:Femoral pseudoaneurysms were tried established in 20 New Zealand rabbits by microsurgical technique.CDU,DSA,CTA and MRA were performed in all rabbits on 12 days after surgery and the findings of them were compared with the results of autopsy.Results:Models were made successfully in 16 rabbits.Eleven out of the 16 rabbits had developed thrombus in PA.The shown rates of the PA-body in CDU,DSA,CTA and MRA were all 100%.The shown rate of the PA-supply artery was 81.25%(13/16) in CDU and was 100% in all other three methods.The shown rates of the PA-neck were 81.25%(13/16)、87.5%(14/16)、37.50%(6/16)and 31.25%(5/16)while the shown rates of the thrombus in PA were 81.82%(9/11),18.18%(2/11),18.18%(2/11) and 36.36%(4/11) in CDU,DSA,CTA and MRA,respectively. Conclusions:Thereare no significant difference in showing the PA-body and PA-supply artery in CDU,DSA,CTA and MRA. In showing the PA-neck,CDU and DSA are superior to CTA and MRA,while CDU is superior to DSA,CTA and MRA in showing the thrombus in PA.In addition,the blood dynamic changes of PA-body,PA-neck and PA-supply artery can be studied timely by CDU,so CDU has high value in the follow up of the patient with PA.