The invention discloses a 3D module post pulling-out method. A front beam, a rear beam, lug plates and a vertical post are involved. The lug plates are arranged in front and at the back of the front beam and the rear beam. The connecting position of the front beam and the rear beam is located on the vertical post 4. The front beam and the rear beam are connected through bolts, are double-face beams, and are each provided with rib plates in a truss form. According to the construction steps of the 3D module post pulling-out method, the front beam and the rear beam are fixed well and are arranged on the vertical post, the beams are fixed well, and finally the vertical post is pulled out. According to the 3D module post pulling-out method, installation is convenient, the cost is reduced, and the vertical post canceled after splicing can be recycled; a welding mode is changed to a bolt connection mode, the need of structure deformation in the hoisting and transportation processes is guaranteed, and the requirements that detachment construction is convenient while the size and decoration of a structure building are not affected in the later period are met; and the usable space is large after detachment, the whole space is not limited by the structure, and layout can be conducted freely.