Numerical　simulation　research　on　pipelines　subjected　to　explosion　impact　basically　turns　to　ALE.　Yet　it　suffers　from　unclear　interfaces　between　flowing　materials　and　fails　to　value　the　impact　of　soil　compression　state　and　pipe-soil　sliding　on　pipeline　stress.　To　streamline　calculation　and　better　demonstrate　the　damage　process　of　soil　under　explosion　load,　this　study　applies　SPH-FEM　coupling　to　study　the　dynamic　response　of　buried　pipelines　under　explosion　load,　and　compares　results　of　this　study　with　experimental　results　of　Ambrosini　et　al.,　and　good　consistency　was　observed.　This　study　dissects　the　dynamic　response　of　the　buried　X65　pipeline　under　explosion　load,　considers　the　influence　of　different　diameter-thickness　ratios　of　the　pipeline　and　the　distance　from　the　explosion,　and　compares　the　simulation　results　in　virtue　of　numerical　analysis.　SPH-FEM　coupling　intuitively　simulates　the　entire　development　process　of　explosion　craters　under　the　action　of　explosion　load,　and　handles　the　SPH　boundary　problem　well,　found　study　outcomes.　As　the　diameter-thickness　ratio　of　the　pipeline　decreases　and　the　explosion　distance　increases,　the　deformation　and　maximum　equivalent　strain　of　the　pipeline　gradually　decreases,　and　the　impact　of　the　explosion　distance　is　much　greater　than　the　diameter-thickness　ratio.　This　study　offers　reference　for　upgrading　the　protection　design　of　steel　pipes.　©　The　Author(s),　under　exclusive　license　to　Springer　Nature　Switzerland　AG　2024.