Abstract: A wood-fiber aluminum-plastic composite profile and a producing method thereof is provided. The profile comprises: an inner core made from minerals, plant fibers, additive and a type of waste plastic, and a protective film layer on the outer surface of the inner core made from a type of plastic identical to that of the inner core. The producing method comprises: adding raw material in weight ratio with main material of 30-55%, supplement material of 38-55%, filler of 5-30%, and additive of 2-6% in a mixer, processing into particles, and co-extruding the inner core and the protective film layer synchronously. The profile produced by the method has good quality, long service life, high durability and wide application range.