The invention discloses a coated water-based double-component fluorocarbon paint, and preparation and application thereof. Particularly, the paint comprises a component A and a component B in a mass ratio of (12-25):1. The component A is composed of deionized water, an anti-settling agent, a wetting and dispersing agent, a defoaming agent, a pigment, a water-based fluorocarbon resin, a substrate wetting agent, a leveling agent, a cosolvent, a catalyst, matting powder and a thickener; and the component B is composed of a polyisocyanate curing agent. The paint can be used for preparing a coated PET (polyethylene terephthalate) back panel film.