There　are　ways　to　evaluate　the　stress　of　soil　nails,　but　the　actual　stress　is　very　different　from　theoretical　analysis.　In-situ　measurements　in　CNC　project　in　Beijing,　mostly　adopt　the　method　which　lays　the　reinforcing　steel　bar-stress　measuring　apparatus　on　primary　reinforcing　steel　bar　to　gain　actual　pull　force　when　the　soil-nailing　in　working　condition.　Another　method　is　to　contrast　the　actual　pull　force　with　the　value　calculated　by　current　regulations.　The　result　of　the　study　shows　that　the　stress　of　soil　nails　along　the　length　direction　appears　to　be　parabola　distributing,　and　the　actual　pull　force　in　soil　nails　is　no　less　than　30　kN　which　is　far　less　than　designed　stress.