Building indoor decorative plate capable of being detached and replaced

The utility model relates to the technical field of decorative building materials, and discloses a detachable and replaceable building indoor decorative plate which comprises a plate body, an upper cover plate, a lower cover plate and a fireproof mechanism, the upper cover plate and the lower cover plate are fixedly connected to the upper surface and the lower surface of the plate body, and the fireproof mechanism with a fire extinguishing function is arranged in the plate body. The fireproof mechanism comprises a container arranged in the plate body, inert gas is arranged in the container, the bottom of the container is fixedly connected with an air pipe, and one end of the air pipe is movably connected with a rubber plug. The upper cover plate and the lower cover plate are fixedly connected with the plate body through the reinforcing columns, if a fire is on fire, the decoration sticker is deformed and damaged due to the temperature of the fire, meanwhile, the rubber plug is softened or degraded due to the