The invention relates to the technical field of heat
radiation, in particular to a heat radiator and a manufacturing method thereof. The heat radiator is composed of cooling fins, a fixed medium cavity fixedly connected with the cooling fins, a
heat transfer contact base body movably connected with the fixed medium cavity and a connecting piece arranged on the upper surface and the lower surface of the
heat transfer contact base body. Then, the fixed medium cavity is included in the heat radiator, and media in the fixed medium cavity are defined as heat conduction oil. Then, a large amount of heat can be transmitted out of the
heat transfer contact base body through the performance of the heat conduction oil. Then, heat exchange is achieved, the heat
radiation effect is improved through rotation and large-area treatment of the cooling fins, and the heat
radiation effect on equipment needing heat radiation treatment is guaranteed. In the manufacturing process, the cooling fins and the fixed medium cavity are formed in an
ultrasonic welding manner or a manner of being squeezed into a whole; then the character that heat radiation of
welding blocks is uneven due to a tradition
welding manner is reduced; and then the heat radiation performance of the heat radiator is improved.