Abstract: To address the issues of excessive roundness deviation and high energy consumption in the machining of automobile engine cylinder hole, an integrated optimization method for boring machining of automobile engine cylinder hole considering roundness and energy consumption is developed. A processing deformation prediction model is first established using the finite element method and an improved Kriging model. A cylinder hole roundness model is established by comprehensively considering processing deformation and machine tool motion errors. The energy consumption characteristics of the engine cylinder hole boring process are systematically analyzed, and a processing energy consumption model is established. The integrated optimization model for cylinder hole boring is then established by comprehensively considering maximum roundness and minimum processing energy consumption. A multi-objective optimization algorithm is used to solve the problem, and the process parameter combination that optimizes both comprehensive processing energy consumption and roundness is determined. Finally, based on the actual case of cylinder hole boring in an engine factory in Chongqing, the proposed method was tested to verify its effectiveness.