In　this　paper,　a　new　kind　of　experimental　device　that　can　be　used　in　simulating　the　extrusion　and　fracture　of　charge　bed　is　given.　Its　structure　and　working　principle　are　introduced.　Using　the　semi-closed　vessel　as　the　source　of　compression　force,　the　device　can　simulate　any　kind　of　dynamics　status　in　propellant　charge　at　the　bottom　of　projectile.　The　fragmentized　propellant　is　not　combustion　after　experiment　by　using　the　piston　as　the　compression　medium.　Many　simulation　experiments　are　accomplished　and　the　dynamics　status　of　the　propellant　fracture　is　acquired.　The　experimental　results　show　that　the　new　device　really　repeats　the　principle　of　the　compression　and　the　fracture　of　charge　bed.　The　device　solves　a　key　problem　in　the　study　of　launch　safety　of　propellant　charge.