Abstract: This paper studies the production technology of aluminum profiles used for LED to solve problemsof mold design, manufacture, and profiles production, such as complex cross-sectional shape, large crosssection, long cantilever length and distinctive wall thicknesses. The qualified aluminum profiles used forLED are prepared through the following processes: optimize and adjust the chemical composition of aluminumalloy; optimize mold design and manufacture; electromagnetic stirring, online degassing, high purity nitrogenblown into the refining agent in the melting process; semi-continuous direct water-cooled casting method, online adding aluminum titanium boron filaments, and optimal process conditions in the casting process; special extrusion method lower than 8 MPa, on-line quenching treatment and aging treatment in the extrusionprocess. All the production processes are closely and strictly controlled. The physical and mechanicalproperties of LED aluminum profiles conform with corporate and national standards.