Sound insulation structure, sound insulation door and sealing door device thereof

The invention provides a sound insulation structure, a sound insulation door and a sealing door device thereof. The sound insulation structure is used for being connected into a sliding groove of a mounting base. The sound insulation structure comprises a sliding seat, a lifting mechanism and a sealing mechanism. The lifting mechanism comprises a sliding assembly, a telescopic assembly and a lifting assembly, the sliding assembly is arranged in a sliding hole in a penetrating mode and slidably connected with the sliding seat, the sliding assembly is further used for being slidably connected tothe mounting base, the telescopic assembly is located in a containing cavity and arranged on the sliding assembly in a sleeving mode, the two ends of the telescopic assembly are used for abutting against the mounting base and the sliding assembly correspondingly, the lifting assembly is connected with the sliding assembly and further used for being connected to at least one of the sliding seat and the mounting base, and