Deep　foundation　pit　excavation　has　a　significant　influence　on　the　safety　of　its　adjacent　buildings.　The　deformation　characteristics　and　response　pattern　change　with　variety　different　impact　factors,　such　as　geological　conditions,　pit　excavation　size　and　foundation　form　and　so　on.　Taking　the　20m　deep　station　foundation　pit　and　the　13.4m　deep　passageway　excavation　as　a　typical　example,　this　paper　thoroughly　explores　the　influence　of　the　two　foundation　pit　excavation　on　the　deformation　and　settlement　characteristics　of　the　raft　foundation　of　the　adjacent　buildings.　Combined　with　the　results　obtained　by　the　numerical　simulation　methods　and　preliminary　information　collected　from　an　investigation,　it　shows　that　a　large　lateral　displacement　occurs　at　the　middle　of　the　segment　side　wall　of　the　station　foundation　pit　excavation-reduced,　which　was　increased　by　the　excavation　of　passageway　foundation　pit.　The　foundation　settlement　continuously　increased　in　the　excavation,　and　the　differential　settlement　of　the　eastern　foundation　changed　significantly　in　the　process　of　passageway　construction.　The　adjacent　buildings　slight　incline　to　the　direction　of　the　foundation　pit.　To　ensure　the　project　carried　out　smoothly,　the　prestress　of　steel　support　located　at　the　connection　of　the　station　and　passageway　foundation　pit　should　be　appropriate　improvement　in　the　construction.