目的　观测腰椎椎板间隙的宽度、高度和面积的差异及其形状特征。  方法　随机选取常平医院2015年2月到2017年10月拍摄的156例腰椎正位X线片（男67例，女89例）。测量L1～2到L5~S1的椎板间隙高度、宽度及面积。对比不同节段及不同性别腰椎椎板间隙宽度、高度及面积的差异，并对其形态进行分型。  结果    （1）不同节段椎板间隙高度之间的差异无统计学意义（P＞0.05）；L1～2与L2～3节段椎板间隙宽度间差异无统计学意义（P＞0.05），其余各节段椎板间隙宽度间的差异有统计学意义（P＜0.05）。L4～5和L5~S1间椎板间隙面积差异有统计学意义（P＜0.05），其余各节段椎板间隙面积之间的差异均无统计学意义（P＞0.05）；（2）不同性别椎板间隙高度之间的差异从L1～2到L5~S1间均无统计学意义（P＞0.05）。不同性别L2～3到L5~S1椎板间隙宽度之间的差异有统计学意义（P＜0.05）。不同性别L2～3到L4～5椎板间隙面积之间的差异有统计学意义（P＜0.05）。  结论　椎板间隙宽度从L3～4到L5~S1呈显著性递增，L5~S1椎板间隙面积显著大于L4～5；不同性别L4～5和L5~S1的宽度有显著性差异；L1～2和L2～3节段椎板间隙为椭圆形，L3～4为扇形，L4～5和L5~S1近似蝶形。   

Objective　To measure the height，width and area of lumbar laminae interval space，and to create a classification of the shape in lumbar laminae interval space.    Methods   156(male: 67, female: 89) X-ray pictures with anteroposterior positions were selected randomly from the database of Changping hospital (2015.02-2017.10). The height，width and area of lumbar laminae interval space were measured, then a classification of the shape of each lumbar laminae interval space was created.    Result   （1）The differences in height of each lumbar laminae interval space was not statistically significant（P＞0.05）. The differences in width of lumbar laminae interval space between L1~2 and L2~3 were not statistically significant（P＞0.05）, and the differences in other segments were statistically significant（P＜0.05）. The differences in the area between the lumbar laminae interval space of L4~5 and L5~S1 was statistically significant（P＜0.05）, and the differences in other segments was not statistically significant（P＞0.05）；（2）The differences in the height of lumbar laminae interval space(from L1~2 to L5~S1) between male and female were not statistically significant（P＞0.05）. The differences in the width of lumbar laminae interval space （from L2~3 to L5~S1）between male and female were statistically significant (P＜0.05）. The area of L2~3, L3~4 and L4~5 lumbar laminae interval space between different sex was statistically significant( P＜0.05).    Conclusion    The width of lumbar laminae interval space is significantly increased from L3~4 to L5~S1, and the area of lumbar laminae interval space in L5~S1 is larger than that in L4~5; The width of lumbar laminae interval space between L4~5 and L5~S1 in different sex is different; The shape of lumbar laminae interval space in L1~2 and L2~3 is like a oval, the shape in the L3~4 is a fan, and the shape of L4~5 and L5~S1  is similar to a butterfly.