The invention relates to the technical field of industrial diamond, and particularly relates to the production process of titanium carbide coating diamond, the diamond is obtained by sintering diamondof which surface is titanized in a carbon-containing mixed gas atmosphere; the volume ratios of each component of the carbon-containing mixed gas are that: 25 to 15 parts of CO, 25 to 15 parts of H ,and 25 to 45 parts of CH4. The specific conditions for sintering are that: keeping the temperature of 550-750 DEG C for 90-180 minutes. The titanium carbide coating diamond is obtained by sintering diamond of which surface is titanized in a carbon-containing mixed gas atmosphere. The titanium carbide diamond is obtained by sintering the surface plated titanium diamond under a carbon-containing mixed gas atmosphere; the titanium carbide diamond can further improve the bonding force of diamond particles and a matrix, and the durability of the tool, meanwhile, the plating layer is inert, so thatthe adverse effect of the pure metal titanium coating in processing materials such as rare earth metals is solved, and can be applied to a high intensity saw cutting or machining object which requires higher on the tool component.