[Sri New Materials: "A metal-based diamond composite radiator and its preparation method" patent application disclosed] On September 9th, information from the State Intellectual Property Office showed that the invention patent application of Sirui New Materials (688102) "a metal-based diamond composite radiator and its preparation method" was made public on September 8, with the application publication number CN122719451A. The announcement shows that the application belongs to a metal-based diamond composite radiator and its preparation method. The method includes: preparing a base plate based on diamond particles; stacking and assembling the base plate with a pre-prepared transition metal layer blank, and obtaining a composite substrate after hot pressing and sintering; preparing a flow channel layer on the surface of the transition metal layer of the composite substrate through additive manufacturing to obtain a radiator. This application uses a diamond composite base plate to achieve efficient thermal conductivity, and uses a transition metal layer to alleviate thermal expansion mismatch stress and ensure interface service reliability. It further combines with a 3D printed flow channel layer to achieve free formation of a complex three-dimensional flow channel structure, thereby achieving the comprehensive technical effects of high thermal conductivity, high interface reliability, and high flow channel design freedom.