The longevity of laying hen cages critically depends on the choice of steel material and corrosion protection methods. This article offers an in-depth analysis of Q235 steel's performance advantages and compares the anti-corrosion mechanisms of hot-dip galvanizing and aluminum-zinc alloy coatings. By adopting scientific material selection and regular maintenance—such as frequent checks on connection fasteners and thorough cleaning of manure channels—you can achieve 15-20 years of reliable service life, reduce replacement costs, and maximize your poultry farming investment returns. This guide provides practical technical decision-making support tailored for poultry farmers.