1. Good heat dissipation effect; 2. Milling can produce a roughness of 0.6um, which can meet the flatness of 0.05mm, which is enough to meet the heat dissipation and assembly requirements of large-scale precision equipment; 3. According to different heat dissipation requirements, materials can be widely used through growth, using special surface treatment (oxidation, spraying, polishing, etc.), and adjusting the structure and size of base materials; 4. It can be widely used through In order to solve the problem that aluminum profile extrusion is difficult and can't be produced, high density fin heat dissipation is realized by means of insert, insert and shovel fins.