根据CPⅢ网横、纵向弦长计算原理，对CPⅢ网横、纵向弦长较差的限差进行了计算，通过实际验证指出运用相邻点位之间横、纵向弦长关系进行CPⅢ网复测的方法是可行的，有助于提升高铁运营维护阶段的复测效率。%According to horizontal and vertical chord length calculation principles of CPⅢ network,the paper calculates the limit value of hori-zontal and vertical chord length of CPⅢnetwork. Through actual test,it points out that applying horizontal and vertical chord length relationship of neighborhood point for CPⅢ network repetition measurement is feasible,which will be some help for improving high-speed railway repetition measurement efficiency at operation maintenance phase.
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