In　order　to　speed　up　the　integration　of　the　building　bottom　space　and　the　urban　environment,　the　paper　analyzes　general　configuration,　traffic　organization,　environment　setting　and　function　space　of　building　bottom　open　space　and　discusses　how　to　integrate　building　into　a　city　and　create　an　attractive　and　vital　urban　space　by　the　introduction　of　city　streets,　outdoor　plaza　and　three-dimensional　traffic.