Fabricated building design device based on BIM technology

The fabricated building design device based on the BIM technology comprises a notebook computer, a projector, an outer shell and an inner shell, the inner shell is inserted into the outer shell along an opening, the notebook computer is placed in the inner shell, a plurality of grooves are formed in the end face of the opening of the inner shell, pressing columns are installed in the grooves through torsion spring hinges, and the pressing columns are connected with the projector through bolts. A buffer pad is installed on the bottom face of the pressing column, a universal holder is installed on the top face of the shell, the projector is installed at the upper end of the universal holder, a protection cover covering the projector is arranged outside the projector, and a plurality of telescopic rods are installed on the bottom face of the shell. The portable notebook computer is simple in structure, equipment can be protected through the outer shell, the inner shell and the protective cover, the notebook comp