A beverage extraction device with easy rejection of capsules, comprising: a housing having a central line and two sides; a first frame and a second frame both disposed inside the housing, the first frame having a length and a chamber with a side wall for holding a capsule with a circular edge, the second frame having a front and two side supports and the second frame being slidable along the length of the first frame; two jaws, each jaw being movably connected to a side support of the second frame, and the two jaws being slidable together with the second frame, each jaw having a front portion and a back portion, the front portion of each jaw extending to the front of the second frame for holding the capsule; wherein each jaw has a plurality of shafts one of which is fitted and assembled in a guiding rail formed on each side of the housing, when the second frame slides forward to a intermediate position, the second frame drives the front portions of two jaws to open, and when the second frame slides backward to the intermediate position the second frame drives front portions of two jaws to close; characterised in that it comprises two guiding plates slidably mounted on the two sides of the housing, wherein each guiding plate has a pushing portion protruding toward the central line of the housing for pushing the circular edge of the capsule, and the side wall of the chamber of the first frame is provided with two notches for receiving the two pushing portions; and wherein a leading groove is defined on each guiding plate, which has a front end that bends outwardly, and one of the shafts of each jaw can slide inside the corresponding leading groove and drive each guide plate to slide forward and backward. a housing having a central line and two sides; a first frame and a second frame both disposed inside the housing, the first frame having a length and a chamber with a side wall for holding a capsule with a circular edge, the second frame having a front and two side supports and the second frame being slidable along the length of the first frame; two jaws, each jaw being movably connected to a side support of the second frame, and the two jaws being slidable together with the second frame, each jaw having a front portion and a back portion, the front portion of each jaw extending to the front of the second frame for holding the capsule; wherein each jaw has a plurality of shafts one of which is fitted and assembled in a guiding rail formed on each side of the housing, when the second frame slides forward to a intermediate position, the second frame drives the front portions of two jaws to open, and when the second frame slides backward to the intermediate position the second frame drives front portions of two jaws to close; characterised in that it comprises two guiding plates slidably mounted on the two sides of the housing, wherein each guiding plate has a pushing portion protruding toward the central line of the housing for pushing the circular edge of the capsule, and the side wall of the chamber of the first frame is provided with two notches for receiving the two pushing portions; and wherein a leading groove is defined on each guiding plate, which has a front end that bends outwardly, and one of the shafts of each jaw can slide inside the corresponding leading groove and drive each guide plate to slide forward and backward.