Wire-mesh box protection device, comprising a wire-mesh box and a heat-resistant protective liner which is arrangeable or arranged therein, wherein the protective liner is detachably connectable or connected to the wire-mesh box, wherein the protective liner is foldable and wherein a shape of the protective liner corresponds to an inner contour of the wire-mesh box in such a way that side walls (2.1 to 2.4) and a floor (2.5) of the wire-mesh box, on the inner faces and on the top face respectively, are completely lined with the protective liner, characterized in that the protective liner has side elements (3.1 to 3.4) and a floor element (3.5), the size and shape of which correspond to the size and the shape of the side walls (2.1 to 2.4) and the wire-mesh box floor (2.5) respectively, a fold-over element (3.7) is arranged on each of the side elements (3.1 to 3.4), wherein at least some of the fold-over elements (3.7), in an inserted state, each fold over an upper edge of a corresponding side wall (2.1 to 2.4), wherein at least one of the fold-over elements (3.7) has a size that corresponds approximately to the size of the floor element (3.5), a fire-resistant acoustic panel (5.1 to 5.6) is arrangeable or arranged on each of the side elements (3.1 to 3.4), on the floor element (3.5) and on the fold-over element (3.7), which has a size that corresponds approximately to the size of the floor element (3.5), the size of each of the acoustic panels corresponding to the size of the corresponding side element (3.1 to 3.4) and the floor element (3.5) and the fold-over element (3.7) respectively, and wherein the protective liner is formed in two layers at least in sections, wherein the acoustic panels (5.1 to 5.6) are each arranged between the two layers of the protective liner. and wherein a shape of the protective liner corresponds to an inner contour of the wire-mesh box in such a way that side walls (2.1 to 2.4) and a floor (2.5) of the wire-mesh box, on the inner faces and on the top face respectively, are completely lined with the protective liner, characterized in that the protective liner has side elements (3.1 to 3.4) and a floor element (3.5), the size and shape of which correspond to the size and the shape of the side walls (2.1 to 2.4) and the wire-mesh box floor (2.5) respectively, a fold-over element (3.7) is arranged on each of the side elements (3.1 to 3.4), wherein at least some of the fold-over elements (3.7), in an inserted state, each fold over an upper edge of a corresponding side wall (2.1 to 2.4), wherein at least one of the fold-over elements (3.7) has a size that corresponds approximately to the size of the floor element (3.5), a fire-resistant acoustic panel (5.1 to 5.6) is arrangeable or arranged on each of the side elements (3.1 to 3.4), on the floor element (3.5) and on the fold-over element (3.7), which has a size that corresponds approximately to the size of the floor element (3.5), the size of each of the acoustic panels corresponding to the size of the corresponding side element (3.1 to 3.4) and the floor element (3.5) and the fold-over element (3.7) respectively, and wherein the protective liner is formed in two layers at least in sections, wherein the acoustic panels (5.1 to 5.6) are each arranged between the two layers of the protective liner.