The invention relates to the field of aluminum profile machining, in particular to an aluminum profile bending forming system which comprises a machine body, a control mechanism, first protection mechanisms, a bending mechanism, second protection mechanisms, two adjusting mechanisms and a fixing mechanism. The side wall of a rotating column is located in one material port to be symmetrically and fixedly connected with fixing barrels of a hollow cylindrical structure, the centers inside the two fixing barrels are fixedly connected with fixing columns, the surfaces of the fixing columns are symmetrically connected with fixing rings about a limiting block, the side walls of the fixing rings, on the top of the limiting block, of the two fixing columns are relatively fixedly connected with a first fixing plate of an arc structure, the side walls of the fixing rings, at the bottom of the limiting block, of the two fixing columns are relatively fixedly connected with a second fixing plate ofan arc structure, the bottom of the first fixing plate and the top of the second fixing ring are provided with the second protection mechanisms making contact with aluminum plates, and the problem that deformation and fracturing are caused since bent aluminum plates are shaken is avoided.