Objective: To investigate the value of ultrasonography in cadaveric necropsy using the animal models. Method: Chest blunt trauma was stimulated in healthy 16 New Zealand rabbits through striking precordia using a BIM-I vertical bioimpacter equipped with 850g，40mm diameter steel rods. The impact center was located in the anterior region between the fourth and the fifth intercostal space. The left ventricular wall thickness, left ventricular hemodynamics, rib fracture, pericardial and pleural effusion as well as pneumothorax were evaluated using ultrasound immediately in animals temporarily surviving after striking. was used to assess cardiac hemodynamics and pericardial effusion. Surviving animals were executed with excessive anesthetic followed by autopsy. The findings of autopsy were compared with results from the ultrasonography. Result: The average thickening of the interventricular septum and the posterior wall of the left ventricle was increased by 1.21 mm and 1.13 mm respectively in animals temporarily surviving after striking, both of which had statistical significance (P<0.001). The FS values of left ventricular ejection fraction and EF values were both significantly decreased by 7.2% and 10.2% respectively (P<0.001). The diagnostic results for pericardial hemorrhage, pleural hemorrhage and rib fracture evaluated by Ultrasound was consistent with those from autopsy results(kappa>0.75). Pulmonary contusion and laceration were detected through pneumothorax sonogram in the died animals. Conclusion: Ultrasound can be used to evaluate chest impact injury. Particularly, ultrasound is a sensitive method to determine pericardium, pleural hemorrhage and rib fracture. Therefore, it has somewhat application value in autopsy.