Dynamic　impact　of　punching　construction　on　adjacent　existing　bridge　pile　foundation　was　analyzed　based　on　finite　element　numerical　analysis　method.　It　shows　that　the　primary　affecting　factors　are　dynamic　loads　magnitudes　and　distance　of　punching　location　to　existing　pile.　M-max　(Bending　moment　maximums)　of　piles　are　in　direct　proportion　to　magnitude　of　dynamic　loads.　With　increasing　the　distance　of　punching　location　to　existing　pile,　M-max　present　exponential　attenuation.　M-max　of　pile　with　fixed　constrain　are　bigger　than　those　of　pile　with　simply-supported　constrain,and　distributions　of　M-max　also　significantly　different.　As　the　depth　of　punching　construction　increased,　M-max　present　increasing　first　and　then　decreasing.　Under　the　same　conditions,the　shorter　pile　is　more　sensitive　to　punch　depth.