The invention discloses a heat dissipation component for a chassis and a manufacture method thereof. The heat dissipation component comprises a heat dissipation plate, wherein a plurality of heat dissipation fins are arranged below the heat dissipation plate, a plurality of mounting slots are formed at the bottom of the heat dissipation plate, connectors are arranged at the upper ends of the heatdissipation fins, the connectors are connected with the mounting slots by hot melt adhesive, fastening elastic members are arranged at two end parts of each mounting slot, the top surface of each fastening elastic member is connected with the top surface of the mounting slot, the lower end of each fastening elastic member is connected with the connector, end covers are arranged at two outer ends of the heat dissipation plate, and abutting blocks are arranged at two ends of the end cover. In manufacture, the heat dissipation plate and the heat dissipation fins with connectors are punched independently, the mounting slots are punched at the bottoms of the heat dissipation plate, heat dissipation holes and heat dissipation slots are punched in the surfaces of the heat dissipation fins, then the heat dissipation fins are arranged in the mounting slots by the hot melt adhesive and the fastening elastic members, and finally the component is covered with an upper end cover. The heat dissipation component has the characteristics of easiness in maintenance, high heat dissipation speed, high heat dissipation efficiency, large-scale manufacturing, reduction in manufacture cost and flexible manufacture process.