The invention relates to a tool for a surgical operation and belongs to the technical field of surgical instruments. The tool for the surgical operation comprises a stainless steel base, a color filmlayer and a diamond film layer or DLC film layer which selectively coats the color layer; a yellow film layer is a TiNbCN layer; the molar ratio, measured by an XPS, of Ti to Nb to C to N is 1:(0.05-0.12):(0.03-0.10):(0.81-0.92); a black film layer is a TiNbCN layer, and the molar ratio, measured by the XPS, of Ti to Nb to C to N is 1:(0.05-0.12):(0.85-1.00):(0.05-0.12). According to the tool forthe surgical operation, the color layer is arranged and can have distinguishing and identifying functions under a microscopic view field, so that the tool for the surgical operation has good appearance, abrasion resistance, stability and biocompatibility, the high-quality diamond film layer or DLC film layer which is well combined with the base can be further formed on the stainless steel base, and the tool for the surgical operation has wide application prospects.