In general,the shape of fused deposition processing parts is complex,the printing parts with large inclination or suspended area will cause collapse deformation and affect the print quality when printed directly on a machine tool.Therefore,it is necessary to accurately identify the weak area of the model and add support structure for it.According to the patch angle,the dangerous triangular patches were selected.The independent support area was established by using the seed diffusion method,and the support points were distributed adaptively in the support area;the support path generation algorithm was simplified by slice contour information,and the optimal support path was selected adaptively;the adjustable parameters in the algorithm were obtained through printing test on the machine tool,and the adaptive columnar support algorithm and Slic3r support algorithm were used to process multiple models.The results show that by using the adaptive columnar support algorithm,the support consumables are reduced,the calculation time is saved.