目 的  测量股骨偏心距的大小并探讨其临床意义。 方法  对100例正常双髋关节X线片进行影像学测量，测量参数包括股骨偏心距、颈干角、股骨头直径、外展肌力臂、体重力臂、小转子中点及其上下20 mm的冠状径、峡部直径和髓腔闪烁指数等，SPSS10.0统计学软件分析股骨偏心距与外展肌力臂、体重力臂、股骨髓腔各解剖参数的相关关系及男女各参数间的差异，并将测量结果与国内外学者的测量参数进行比较。  结果  本组股骨偏心距大小为（36.64±5.31）mm；股骨偏心距与外展肌力臂呈明显的正相关　(r=0.73, P<0.01)，与股骨颈干角呈负相关(r=-0.46, P<0.01)，与其它股骨近端解剖参数无明显相关性。男女两性间股骨偏心距、颈干角、股骨头直径、外展肌力臂有显著性差异（P<0.05）。本组股骨偏心距、颈干角与白种人有显著性差异（P<0.01）。  结论  股骨偏心距大小为（36.64±5.31）mm，重建股骨偏心距有利于恢复外展肌力臂，重建正常髋关节生物力学。

        Objective  To investage the range of femoral offset and explore its clinical significance. Methods  100 cases of normal anteroposterior hip joints radiographic image were measured. Parameters included femoral offset, abductor lever arm, body weight lever arm, femoral head diameter, neck-shaft angle, the width of bone medullary cavity at the plane of lesser trochanter，20 mm above and below the lesser trochanter, diameter of the narrow cavity and canal flare index （CFI）. The correlation between femoral offset and other anatomical parameters in femur were explored by simple correlation analysis. The proximal femoral parameters between Chinese and the Western were compared.  Results   The range of femoral offset was (36.64±5.31)mm. Femoral offset and abductor lever arm was positively correlated(r=0.73, P<0.01). Femoral offset was negatively correlated neck-shaft angle(r=-0.46, P<0.01). There were no significance correlation between femoral offset and other anatomical parameters in femur. There was a significant difference in the diameter of the femoral head, neck-shaft angle, femoral offset, abductor lever arm between men and women (P <0.05). There was a significant difference in neck-shaft angle, femoral offset between Chinese and the Western (P<0.01). Conclusions   The range of femoral offset was (36.64±5.31) mm. Restoration of femoral offset can recover the length of abductor lever arm and restore the biomechanics of the hip.