Construction profile extrusion molds often cause profile twisting, bending, and wavy deformation caused by uneven metal flow rates. The surface of the profile is prone to extrusion streaks, pitting, and aluminum sticking strains. Appearance defects will be amplified after anodizing. At the same time, wall thickness deviations and opening size deviations are prone to occur. The shunt mold will also have obvious welding lines, insufficient welding strength, and cracking during sawing or assembly. Mold aspects , the concentration of stress at sharp corners can easily cause mold core chipping and splitter bridge cracking. Long-term friction and wear of the work belt will be rapid. Insufficient mold rigidity will produce elastic deformation, resulting in continuous dimensional fluctuations during mass production. There will also be production interruption problems such as mold blocking and boring. This needs to be improved by optimizing the split structure, matching the length of the work belt, doing heat treatment and nitriding treatment, and adjusting the extrusion process.