In view of the obvious denitrification phenomenon of Ti(C, N)-based cermets in the process of sintering, nitrogen partial pressure sintering method has been adopted as one of the keys to achieving a controllable microstructure with an optimized performance. Three Ti (C, N)-based cermets are prepared with different nitrogen contents, followed by a study on the effects of nitrogen content and sintering temperature on the microstructure and properties of the alloy core and surface gradient layers. The results show that as the nitrogen content increases, the number of Ti (C, N) black cores in the alloy core increases as well, the thinner the thickness of the outer rim of the black core, the finer the hard phase grains will be. The nitrogen decomposition pressure of the sample gradually increases correspondently with an increase in the sintering temperature, transforming from an initial nitriding process to a subsequent denitrification phenomenon. At a sintering temperature of 1 470 ℃, nitriding reaction occurs on the surface of the alloy, forming a rimless black core aggregation layer on the surface, its thickness decreasing with the increase of nitrogen content of the alloy. When the sintering temperature reaches 1 530℃, denitrification reaction occurs on the surface of the alloy, forming a layer of gray solid solution. With the increase of alloy nitrogen content, the more intense the denitrification reaction, the thicker the solid solution layer will be. It is found that the alloy with the highest nitrogen content has the the thinnest black core aggregation layer and the finest hard phase grains in the samples sintered at 1 470 ℃ and 0.8 kPa nitrogen partial pressure, exhibiting a better comprehensive performance.