The invention is a kind of nano aluminum alloy anti-burglary security door which belongs to safe door product field in building field. The manufacturing method includes following six steps: aluminum alloy casting, sectional bar extruding, mechanical process forming component, weld or rivet forming, surface process, then assembling. The nano surface process is the key technology, the invention carries on nano oxide and nano coloring process to the surface, the process is: degreasing, water cleaning, neutralizing, oxidization, water cleaning, water cleaning, coloring, water cleaning, water cleaning (deioned water), electrophoresis painting, water cleaning, water cleaning, drying, unloading. The product is tight, anti-burglary, anti-corrosion, and rust-proof.