Plane frame model and spatial entity model of a rigid-frame-continuous combination bridge are established using finite element analysis software Dr. Bridge and ANSYS. Taking the most unfavorable loading positions of vehicle load in longitudinal and transverse direction into ac-count through the analysis on space stress under three different combinations,it turned out that the stress of rigid-frame-continuous combination bridge accords with the real condition analyzed by spatial entity model.%采用有限元分析软件桥梁博士和ANSYS建立某刚构—连续组合梁桥的平面杆系模型和空间实体模型，综合考虑汽车荷载在纵桥向和横桥向最不利的加载位置，通过对三种不同组合作用下的空间应力进行分析，指出空间实体模型分析刚构—连续组合梁桥的应力较符合实际情况。
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