The invention provides a waterborne one-component adhesive and application thereof to automotive interior trim bonding. The waterborne one-component adhesive is prepared from the following componentsin parts by weight: 30 to 50 parts of waterborne polyurethane-acrylate copolymer emulsion, preferably 35 to 45 parts, and 50 to 70 parts of waterborne polyurethane dispersion, preferably 55 to 65 parts. The waterborne one-component adhesive disclosed by the invention does not need to be used now, and the limitation to the use time of the existing adhesive is relieved; the use is facilitated, and the efficiency of interior decoration of an automobile is greatly improved.