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In order to accurately control aeroengine blade surface data and design engine blades that are more suitable for practical application needs, the Iterative reconstruction model construction method of aeroengine blades based on Reverse engineering is studied. According to the principle of Reverse engineering, collect 3D data samples, and define the topological relationship of 3D data of engine blades according to the error correction conditions, so as to analyze the neighborhood form of 3D data samples and realize the neighborhood construction of 3D data of aeroengine blades. Implement the point cloud splicing processing of 3D data, follow the 3D fitting principle, extract the complete engine blade boundary, determine the value range of the reconstructed Quaternion according to the Iterative reconstruction node configuration requirements, derive the specific reconstruction model expression, and complete the construction of the Iterative reconstruction model of the aeroengine blade based on Reverse engineering. The experimental results show that the application of the above model can ensure that the coordinate error between the landmarks during modeling and the landmarks after Iterative reconstruction does not exceed 0.5mm, which is in line with the actual application requirements for precise construction of aeroengine blades.