The invention relates to a high-performance aqueous alkyd resin paint prepared through the steps that: (a) plant oil aliphatic acid is subject to a reaction with polybasic acid and polyol, such that oleiferous alkyd resin is obtained; (b) oleiferous alkyd resin is subject to a reaction with trimellitic anhydride, such that oleiferous alkyd resin with excessive carboxyl is obtained; (c) the oleiferous alkyd resin with excessive carboxyl is neutralized by using a neutralizing agent, such that aqueous alkyd resin is obtained; and (d) the aqueous alkyd resin is mixed with aqueous amino resin and water, and the pH value is regulated, such that the aqueous alkyd resin paint is obtained. The aqueous alkyd resin paint provided by the invention has good storage stability, and a paint film prepared with the paint has good mechanical properties. With the novel preparation method provided by the invention, reaction time is shortened, and production energy consumption is reduced. Water is used as a diluent of the product. The product causes no toxicity, no combustion, and no pollution to the environment. The paint can be used as common industrial baking paint, vehicle top paint, bicycle baking paint, and the like.