The utility model discloses an atmospheric pressure interface apparatus generating ion fragments. The atmospheric pressure interface apparatus comprises a stainless steel capillary tube, a focusing electrode sheet, a quadrupolar lever device, a lead-out electrode sheet and a planar separating awl which are coaxially arranged successively, wherein the center of the planar separating awl is provided with a small hole. The atmospheric pressure interface apparatus provided by the utility model has the following advantages: the structure is simple, individual introduction of a collision induced dissociation device is unnecessary, and two functions of ion focusing and ion fragmenting can be simultaneously realized; quadrupolar levers, after radio frequency voltages are applied thereto, can enable introduced sample ions to fully bump against a background gas and gather on an apparatus axis; the voltage difference between the lead-out electrode sheet and the planar separating awl controls the generation of the ion fragments; and the transmission of the sample ions and the generation of the ion fragments both occur on the apparatus axis so that the transmission efficiency of the sample ions and fragment ions is ensured. The atmospheric pressure interface apparatus generating the ion fragments can be widely applied to the field of mass spectrometry.