Abstract: Large-span spatial structure nodes often presents the properties of complexity and diversity, resulting a high requirements in modeling process and analysis. The softwares mostly used in Civil Engineering fail to meet the function needs for specific space structure design and complex node analysis. It usually takes the designer large amount of time in the adjustment of the parameter and modeling during the node analysis. Therefore, applying the powerful visualization of Matlab-GUI and the superior analytic function of Ansys, Intellectualized Analysis System for Steel Joints embodies the features of human-computer interaction parameter input -parameterized modeling-finite element Analysis-automatic generation of intelligent Analysis program. The preliminary version of this system has the analysis function of 15 different node kinds, simultaneously with a number of auxiliary functions such as information search, results output. It provides a quick and efficient approach for the complex node design, analysis, integration of space structure.