A　target　in　layered　medium　can　be　located　by　the　ridge-like　distribution　time　reversal　and　reverse　time　migration　(TR-RTM)　mixed　method.　However,　this　method　cannot　distinguish　between　acoustic　field　distributions　of　the　interface　and　target　for　the　wider　acoustic　pulse　signals,　which　may　result　in　inaccurate　location　of　the　target.　A　snapshot　TR-RTM　mixed　method　is　proposed　to　solve　this　problem.　The　principle　of　snapshot　TR-RTM　mixed　method　is　first　given.　Experiments　are　then　carried　out,　and　a　mountain-like　acoustic　field　distribution　is　obtained　by　processing　experimental　data.　The　results　show　that　the　location　of　the　peak　is　that　of　the　target,　and　the　ratio　of　the　scattered　signal　and　interface　reflection　signal　(signal-to-interference　ratio)　is　improved　by　about　four　times　after　processing.　Furthermore,　this　method　can　effectively　suppress　the　interface　reflection　signal　and　enhance　the　target　scattering　signal.　Therefore,　it　can　achieve　effective　detection　and　location　of　a　target　in　a　layered　medium.