A buckling structure for a battery of a handheld power tool includes a horizontal opening end formed at a handheld seat of the power tool, a buckling structure arranged on top of a battery base and configured to mutually guide, insert and buckle into the opening end to be integrally attached thereto, the buckling structure comprising: a guiding slot formed at a front side surface of the battery base, two receiving slots formed at two sides of the guiding slot respectively, a pressing member arranged inside the guiding slot and two buckling members arranged inside the receiving slot respectively, and an elastic element connected to the pressing member and each of the buckling members respectively, thereby achieving an assembly and buckling structure having single direction movement and stable, durable structure that is convenient to use and operation.