目的　使用多层螺旋CT(MSCT)探查高 +Gx 过载致猴肺部损伤的影像学动态改变以确定其在研究飞船应急返回可能造成的肺损伤中应用的可行性。　方法　 8只健康雄性成年恒河猴被随机分为 +15Gx 组、+18Gx 组和 +2 1Gx 组 ,分别在动物离心机上承受相应峰值的抛物线形 +Gx曲线作用 ;8只恒河猴分别在试验前、试验后 2h、2 4h、1周行MSCT检查。　结果　 +15Gx 组、+18Gx组和 +2 1Gx 组在过载作用后即刻肺脏出现了不同程度的气肿 ,部分出现气胸、肺出血 ;1周后肺部影像基本恢复正常。　结论　飞船应急返回高过载可引起肺部损伤 ,MSCT可早期检出损伤 ,并具有扫描速度快 ,重复性好 ,分辨率高的特点 ,在载人航天过载损伤的研究中具有广阔的应用前景。 Objective To investigate the dynamic changes of lung injury in monkey with high + Gx overload using multi-slice spiral CT (MSCT) to determine the feasibility of its application in the study of lung injury possibly caused by the emergency return of spacecraft. Methods Eight healthy male adult rhesus macaques were randomly divided into + 15Gx group, + 18Gx group and +2 1Gx group, respectively, which were subjected to the parabolic curve + Gx curve on the animal centrifuge. Eight Rhesus monkeys Before, 2h, 24h, 1 week after the test MSCT. Results In the 15Gx group, the + 18Gx group and the +2 1Gx group, some emphysema appeared in the lungs immediately after overload, and pneumothorax and pulmonary hemorrhage occurred in some cases. After 1 week, the lung images returned to normal. Conclusions The spacecraft returned to high overload after emergency return can cause lung injury. MSCT can detect the damage early and has the advantages of fast scanning speed, good repeatability and high resolution. It has broad application prospects in the study of manned space flight overloading damage.