Finite element modeling method for special-shaped spatial structure

The invention discloses a finite element modeling method for a special-shaped spatial structure. A finite element model comprises nodes, units, load and boundary conditions, wherein the units are divided into line units, surface units and entity units. The finite element modeling method is characterized by comprising the following steps: a space geometric model is picked up in CAD (computer aided design) software, a finite element graphic read-in method is adopted with combination of a graphic component management method, pre-processing data of a finite element computational model are rapidly output, and cross section rotating angles are assigned in a batch manner according to a space free-form surface. According to the method, a finite element structural analysis model can be established rapidly, the model is accurate and reliable, a structure checking model is rapidly provided for design change, and human resources are saved.