In this paper,diamond/CuCr and diamond/CuB composites were prepared using the pressure infiltration method.The physical property measurement system(PPMS)was adopted to evaluate the thermal conductivity of diamond/Cu and MoCu composites within the range of100–350 K,and a scanning electron microscope(SEM)was utilized to analyze the microstructure and fracture appearance of the materials.The research indicates that the thermal conductivity of diamond/Cu composite within the range of100–350 K is 2.5–3.0 times that of the existing MoCu material,and the low-temperature thermal conductivity of diamond/Cu composite presents an exponential relationship with the temperature.If B element was added to a Cu matrix and a low-temperature binder was used for prefabricated elements,favorable interfacial adhesion,relatively high interfacial thermal conductivity,and favorable low-temperature heat conduction characteristics would be apparent. In this paper, diamond / CuCr and diamond / CuB composites were prepared using the pressure infiltration method. The physical property measurement system (PPMS) was adopted to evaluate the thermal conductivity of diamond / Cu and MoCu composites within the range of 100-350 K, and a scanning electron microscope (SEM) was utilized to analyze the microstructure and fracture appearance of the materials. The research indicates that the thermal conductivity of diamond / Cu composite within the range of 100-350 K is 2.5-3.0 times that of the existing MoCu material, and the low-temperature thermal conductivity of diamond / Cu composite presents an exponential relationship with the temperature. IF B element was added to a Cu matrix and a low-temperature binder was used for prefabricated elements, favorable interfacial adhesion, relatively high interfacial thermal conductivity, and favorable low-temperature heat conduction characteristics would be apparent.