The invention discloses a metal-based ceramic cutter and a preparation method thereof, the main components of which are composed of the following materials: TiN: 7‑15%, TiC: 40‑60%, Mo 2 C: 8‑20%, WC: 8‑20%, ZrC: 1‑2%, Al 2 o 3 : 1‑2%, Si 3 N 4 : 3‑5%, BN: 0.1‑0.5%, C: 1‑2%, Ni: 8‑15%, Co: 3‑8%, Cr: 4‑8%, La 2 o 3 : 1‑3%, CeO 2 : 0‑1%, Pr 6 o 11 : 0‑1%, Nd 2 o 3 : 0-1%, by grinding and preparing powder, pressurized granulation, initial molding, pressure sintering, post-treatment, etc., reasonable control of process parameters, and finally ceramic tool material, the invention is simple to operate, and the tool material has chemical stability and It has the advantages of anti-cutting fusion, capable of cutting refractory metals, and small friction coefficient against steel.