The meniscus chemical coating technology becomes a very promising new chemical thin-film coating technology after traditional coating technologies such as spin-coating and spray coating due to its merits of large area, low-cost and high efficiency. To meet the requirements of one national major projects on the meter-scale chemical thin film coating of optical component surface, based on the systematical research of the meniscus chemical film coating principal, static and dynamic gluing experiments were respectively conducted, and the relationships among the gluing pressure, the gap between substrate and slit, the material hydrophobicity and the morphology of meniscus were analyzed, then the fine tuning of the meniscus could be achieved and equipment based on the meniscus chemical thin film coating technology was developed. The coating uniformity of photo-resist was realized using this equipment on the glass substrate sizing 1 400 mm×420 mm, making overall coating thickness error less than 4% and satisfying coating requirements of meter-scale chemical precision thin film coating of optical component surface.