Abstract: Reverse engineering can reconstruct CAD models from existing physical models of a product, thereby shortening the secondary development cycle. However, in traditional reverse engineering, CAD modeling and CAE analysis use different model representations, which results in cumbersome model interactions and affects the efficiency of product development. To realize the fast structure analysis for reconstruction models, an embedded domain geometric analysis method tailored for reconstruction models is proposed. Firstly, the point cloud model of the object is obtained through three-dimensional scanning. Then, the point cloud is embedded into an analysis domain of regular elements, which are classified into solid, fictious and trimmed elements based on the positions of the point cloud. Subsequently, a numerical integration method suitable for irregular regions is used to compute the stiffness matrices of the trimmed elements, thereby enabling isogeometric analysis of complex 3D reconstructed models . Through the analysis of four examples including artistic models, gear shafts, wrenches, and screw parts, the results show that, compared to traditional finite element analysis methods, the proposed method has a relative error in maximum analysis results of no more than 5%. This demonstrates that the method can efficiently and accurately analyze the performance of point cloud models reconstructed via reverse engineering, which validates the effectiveness and accuracy of the proposed method.