The invention relates to a three-dimensional modeling device which comprises a number of automatic supporting frames, a placement platform and a graphic working station. A number of automatic supporting frames in an annular structure are placed in the periphery of the placement platform. A number of automatic supporting frames are connected with the graphic working station through lines. The graphic work station controls the automatic adjustment of a number of automatic supporting frames. An illuminator is arranged between each two adjacent automatic supporting frames. A number of illuminators in an annular structure are arranged in the periphery of the placement platform. A number of cameras are arranged on one end part, which is close to the placement platform, of each automatic supporting frame. A number of cameras photograph the objects of the placement platform and transmit the generated image information to the graphic working station. The graphic working station carries out three-dimensional mapping according to the image information. Compared with the prior art, the three-dimensional modeling device provided by the invention has the advantages of convenient operation, fast three-dimensional modeling, multiple-angle object shooting, low overlapping degree of adjacent images, short photographing time and automatic modeling and drawing.