The invention discloses inner paint of a metal beverage food can, a preparation method and an application thereof. The paint comprises the following components by mass: 35-70% of saturated polyester, 1-15% of amino resin, 3-20% of phenolic resin, and 1.8-2.5% of an additive. The components are mixed to obtain the paint provided by the invention. The paint has the following advantages that: no toxic monomer is contained; a coating prepared by the paint can resist high-temperature sterilization and acid boiling, has very good flexibility, thus can be used as an inner coating of easy-drawing lids, an inner coating of two-sheet deep drawing food cans, and an inner wall coating of three-sheet beverage cans, is suitable for storage of carbonated beverages, beer, sardine, pork luncheon meat, tomato sauce, and the like; the paint realizes a single coating weight of up to 13 g/m2, can replace double coating process by epoxy primer and organosol finish in a sheet coating mode, does not turn white during boiling, has excellent adhesive force, and cause no feather film.