In　order　to　analyze　the　impact　of　＇smart　city＇pilot　policy　on　the　quality　of　foreign　investment　accurately　in　China,　based　on　the　panel　data　of　226　prefecture　level　cities　from　2006　to　2017.　This　paper　constructs　a　difference-in-differences　model　by　Stata　software,　taking　the　quality　of　foreign　investment　as　the　research　object,　through　the　level　of　economic　development,　scientific　and　technological　innovation　and　other　variables　for　empirical　analysis.　The　research　shows　that　the　implementation　of　the　＇smart　city＇pilot　policy　has　significantly　improved　the　quality　of　foreign　investment　in　pilot　cities,　and　the　results　are　still　valid　after　a　series　of　robustness　tests.　Based　on　the　above　results,　this　paper　puts　forward　some　policy　suggestions　for　the　future　construction　of　＇smart　city＇and　the　optimization　of　urban　foreign　investment　attraction　mode.　©　2021　IEEE.