Based　on　the　target　of　the　test　and　the　theory　of　vibration　isolation,　a　suspension　multidirectional　laminar　shear　model　box　is　developed.　This　box　is　a　spatial　structure　system　composed　of　circular　frames　suspended　through　steel　cables,　suspension　bracket　and　motherboard.　Theoretical　analysis　is　carried　out.　The　results　show　that　the　methodologies　of　vibration　isolation　and　the　structural　forms　can　reduce　the　effect　of　the　model　box　on　the　model　soil　and　the　inertia　effect　caused　by　the　mass　of　the　box　itself.　The　simulated　results,　the　comparison　and　analysis　of　the　acceleration　and　the　vibration　modes　of　the　model　soil　indicate　that　the　shear　deformation　is　developed　in　the　model　soil　under　horizontal　earthquake　action　and　the　effect　of　the　box　on　model　soil　can　be　ignored.　The　suspension　multidirectional　laminar　shear　box　is　very　successful　in　simulating　the　soil　boundary.　The　arching　effect　of　the　model　soil　can　be　eliminated.　The　disadvantage　of　the　existing　laminar　shear　box　that　earthquake　wave　only　can　be　input　in　a　single　direction　can　be　conquered.