In　this　study　a　settlement　monitoring　and　analysis　method　considering　the　dynamic　randomness　of　process　is　established　via　introducing　SPC(statistical　process　control).　This　method　determines　whether　the　settlement　change　caused　by　tunnel　construction　is　under　stable　control　using　statistical　control　charts　and　whether　the　settlement　accords　with　the　code　using　process　capability　index.　The　decision　is　made　based　on　these　answers.　The　proposed　method　is　applied　to　analyze　the　settlement　of　shield　construction　under　Beijing-Tianjin　intercity　railway　in　Beijing　Metro　Line　8,　a　vital　project　in　the　traffic　construction,　accordingly　the　feasibility　and　advantage　of　this　method　is　verified.　Over　traditional　methods,　this　method　has　advantages　as　follows.　First,　this　method　can　analyze　the　dynamic　randomness　of　settlement　change　reasonably.　Then,　this　method　can　analysis　the　characteristics　of　settlement　change　scientifically.　Finally,　this　method　can　propose　the　measures　of　engineering　reasonably　based　on　analysis　for　data.　©　2019,　Science　Press.　All　right　reserved.