Gas lift tool and using method

The invention discloses a gas lift tool and a using method, and belongs to the technical field of oil and gas field exploitation. The gas lift tool comprises a working barrel and a blanking plug, theworking barrel comprises a first barrel body and a gas lift hole, the gas lift hole is formed in the first barrel body, and a groove is formed in the inner wall of the first barrel body; the blankingplug comprises a second barrel body, a sleeve, a lifting sleeve, a wire spring and a telescopic elastic block, the lifting sleeve is arranged on the outer side of the second barrel body in a sleevingmode, the sleeve is arranged on the outer side of the lifting sleeve in a sleeving mode, and the wire spring is connected with the lifting sleeve and the telescopic elastic block; the surface, opposite to the lifting sleeve, the wire spring and the telescopic elastic block, of the second barrel body forms a conical surface; when the second barrel body blocks the gas lift hole, the lifting sleeve moves in the direction close