The invention discloses an angle assembly machine for aluminum alloy door and window processing. The angle assembly machine comprises a workbench, wherein one end of the workbench is equipped with an AT89S52 controller; the other end of the workbench is symmetrical with the AT89S52 controller through a hydraulic pump fixed by a supporting frame; one end of the hydraulic pump is connected with a hydraulic telescopic pole; two circular-ring-shaped mounting slots and eight strip-shaped mounting slots are formed in the side surface of the top of the workbench; the eight strip-shaped mounting slots are separately formed in sides of the two circular-ring-shaped mounting slots in two rows; one end, away from the hydraulic telescopic pole, on the top of the workbench is fixedly equipped with two automatic material conveying mechanisms which are distributed in the form of inverted V; and the two automatic material conveying mechanisms are symmetrically distributed along the symmetrical center line of the workbench. According to the angle assembly machine disclosed by the invention, the two circular-ring-shaped mounting slots and the strip-shaped mounting slots are formed, the two circular-ring-shaped mounting slots are used for mounting left and right angular knives, the strip-shaped mounting slots are used for mounting two baffle rods, and two slide plates are rotatably connected with a transverse rod, so that the two slide plates can move.