Sealed cabin structure of 3D printing device

The utility model discloses a sealing cabin structure of a 3D printing device. The sealing cabin structure comprises a sealing cabin, a cabin door and sealing glass, the cabin door is provided with aviewport, and the sealing glass is embedded in the viewport of the cabin door. The cabin door is hinged to the opening of the sealed cabin; a door lock head structure is arranged between the cabin door and the sealed cabin; a first opening connected with the laser galvanometer assembly is formed in the top of the sealed cabin, a second opening connected with the feeding cylinder assembly, a thirdopening connected with the forming cylinder assembly and a fourth opening connected with the powder recovery assembly are formed in the bottom of the sealed cabin, and the first opening and the thirdopening are oppositely formed; a pair of vent holes are oppositely formed in the positions, corresponding to the third opening, of the two sides of the sealed cabin, one vent hole is an air inlet, andthe other vent hole is an a