The　numerical　simulation　and　experiments　of　various　parameters　influencing　lead　extrusion　damper　are　conducted　based　on　the　energy　dissipation　mechanism　of　a　lead　extrusion　damper.　The　test　results　show　that　the　length　and　the　height　of　bulge　are　two　important　factors　in　yielding　force　of　the　lead　extrusion　damper.　Furthermore,　the　hysteretic　curve　of　the　lead　extrusion　damper　is　chubby,　and　the　lead　extrusion　damper　is　an　excellent　energy-consuming　device　and　suitable　for　vibration　control　of　engineering　structures.