The invention provides a laser radiating device, which is made of materials having low density, high thermal conductivity, small linear expansion coefficient and good mechanical performance, wherein the radiating device adopting an anisotropic material as a substrate can realize directional conduction of the heat generated by elements so as to achieve the heating function on other elements or to facilitate further radiating heat by conducting heat. The laser radiating device can well control the working temperature of the laser elements, and has the advantages of one-step forming, simple manufacturing and processing, and convenient batch processing.