An electronic cigarette, comprising: an atomizing assembly, the atomizing assembly comprising a mouthpiece cover, a mouthpiece, a first sealer adapted to seal the mouthpiece, an atomizing core, a connector, a first fixed seat adapted to fix the atomizing core, a seal ring adapted to seal the first fixed seat, a screwed ring, a regulating ring, a second sealer 8 adapted to seal the regulating ring, a joint, an insulation ring, a second fixed seat adapted to fix the regulating ring, an e-liquid feeder comprising an e-liquid inlet, a funnel, a third sealer adapted to seal the funnel, a first spring, a fourth sealer adapted to seal the e-liquid inlet of the e-liquid feeder, and a sealing seat; and a battery assembly, the battery assembly comprising screws, elastic sheets, an electrode holder, a button, output electrodes, a fifth sealer adapted to seal the output electrodes, second springs, fixed rings adapted to fix the output electrodes, a housing, a control plate, a support, and a battery cell; wherein: the atomizing assembly is disposed on the battery assembly; the first sealer is disposed on the connector, and the connector is disposed in the mouthpiece; the mouthpiece cover is disposed on the mouthpiece; the joint is disposed in the insulation ring, and the insulation ring is disposed in the second fixed seat; the second sealer 8 is disposed on the second fixed seat, and the regulating ring is disposed on the second sealer; the seal ring is disposed on and adapted to seal the first fixed seat; the screwed ring is disposed in the first fixed seat; the first fixed seat is disposed in the mouthpiece; the atomizing core is disposed on the second fixed seat, and the second fixed seat is connected to the first fixed seat; the fourth sealer is disposed on the sealing seat, and the sealing seat is mounted on one end of the funnel; the third sealer and the first spring sleeve the funnel, and the funnel is inserted in the e-liquid feeder; the e-liquid feeder is disposed on the first fixed seat; the regulating ring comprises locating slots, and the second fixed seat comprises stop pins corresponding to the locating slots; the control plate and the battery cell are disposed at two sides of the support, respectively; the support is disposed in the housing; the fifth sealer and the second springs are disposed on the output electrodes; the output electrodes are disposed on the electrode holder and are fixed by the fixed rings; the elastic sheets are disposed on the electrode holder and are fixed by the screws; and the button is disposed on the housing, and the electrode holder is disposed in the housing. an atomizing assembly, the atomizing assembly comprising a mouthpiece cover, a mouthpiece, a first sealer adapted to seal the mouthpiece, an atomizing core, a connector, a first fixed seat adapted to fix the atomizing core, a seal ring adapted to seal the first fixed seat, a screwed ring, a regulating ring, a second sealer 8 adapted to seal the regulating ring, a joint, an insulation ring, a second fixed seat adapted to fix the regulating ring, an e-liquid feeder comprising an e-liquid inlet, a funnel, a third sealer adapted to seal the funnel, a first spring, a fourth sealer adapted to seal the e-liquid inlet of the e-liquid feeder, and a sealing seat; and a battery assembly, the battery assembly comprising screws, elastic sheets, an electrode holder, a button, output electrodes, a fifth sealer adapted to seal the output electrodes, second springs, fixed rings adapted to fix the output electrodes, a housing, a control plate, a support, and a battery cell; the atomizing assembly is disposed on the battery assembly; the first sealer is disposed on the connector, and the connector is disposed in the mouthpiece; the mouthpiece cover is disposed on the mouthpiece; the joint is disposed in the insulation ring, and the insulation ring is disposed in the second fixed seat; the second sealer 8 is disposed on the second fixed seat, and the regulating ring is disposed on the second sealer; the seal ring is disposed on and adapted to seal the first fixed seat; the screwed ring is disposed in the first fixed seat; the first fixed seat is disposed in the mouthpiece; the atomizing core is disposed on the second fixed seat, and the second fixed seat is connected to the first fixed seat; the fourth sealer is disposed on the sealing seat, and the sealing seat is mounted on one end of the funnel; the third sealer and the first spring sleeve the funnel, and the funnel is inserted in the e-liquid feeder; the e-liquid feeder is disposed on the first fixed seat; the regulating ring comprises locating slots, and the second fixed seat comprises stop pins corresponding to the locating slots; the control plate and the battery cell are disposed at two sides of the support, respectively; the support is disposed in the housing; the fifth sealer and the second springs are disposed on the output electrodes; the output electrodes are disposed on the electrode holder and are fixed by the fixed rings; the elastic sheets are disposed on the electrode holder and are fixed by the screws; and the button is disposed on the housing, and the electrode holder is disposed in the housing.