The invention provides a sealing device for a hinged part between shelter wallboards. The sealing device comprises a wallboard section, an outer frame section, a hinge and a sealing member, wherein the wallboard section is hinged with the outer frame section through the hinge; the wallboard section is fixedly connected with a shelter wallboard; the outer frame section is fixedly connected with a shelter; the wallboard section and the outer frame section have equal sections and are matched with the shelter wallboard; one end of the section of the wallboard section is provided with a bulge in the vertical direction; a first bump and a second bump are arranged on the top of the bulge respectively; a pressure strip mounting surface is arranged at the top of one end of the section of the outerframe section; the sealing member is fixedly connected with the outer frame section through a pressure strip; a first sealing part and a second sealing part are arranged below the section of the sealing member respectively; and when the installation of the shelter wallboard is completed, the first bump and the second bump of the wallboard section are in close fit with the first sealing part and the second sealing part respectively so as to realize sealing. Based on the design, the sealing device has better waterproof and dustproof effects.