Abstract: The structural parameters of TiB₂-based ceramic tools with complex edge shapes were designed based on microwave sintering characteristics. The effect of tool design parameters on turning forces and temperatures when turning QT450 ductile cast iron was investigated using finite element simulation. For TiB₂-based ceramic tools with complex cutting edges, the optimum tool front angle was found to be 5°, the optimum back angle was found to be 6° and the optimum tip radius was found to be 0.8 mm. Complex edge-shaped TiB₂-based ceramic tools were prepared by microwave sintering technology, and the effects of pressing pressure and holding time on the relative density, mechanical properties and microstructure of complex edge-shaped TiB₂-based ceramic tools were investigated. The results show that the pressing pressure has a great influence on the abnormal growth of grains, and a reasonable pressing pressure can inhibit the abnormal growth of grains, improve the tool fracture mode, and then improve the tool performance. A reasonable holding time can make the white phase on the surface of the tool partition uniform and prevent aggregation, which is conducive to improving the fracture toughness of the tool. When the pressing pressure is 200 MPa and the holding time is 4 min, the dimensional shrinkage of each part of the tool is more average, the forming accuracy is higher, the densification is the highest, the microstructure is more uniform, the grain arrangement is more compact, and the overall mechanical properties are optimal.