An electronic cigarette, comprising: an atomizing assembly, the atomizing assembly comprising a mouthpiece cover, a mouthpiece, a seal holder, a first seal ring, an atomizing core, a silica ring, a first fixed seat, a joint, an insulation seat, a regulating ring, a fixed screw, an e-liquid container, an e-liquid feeder, a second seal ring, a first spring, an e-liquid guider, and a plug; and a battery assembly, the battery assembly comprising a button, a decoration cover, second springs, switch buttons, a decoration ring, a button cap, a light guide, a second fixed seat adapted to fixing a printed circuit board, output electrodes, a third seal ring adapted to seal the output electrodes, third springs, fixed rings adapted to fix the output electrodes, a silica plug, a mainboard, a battery cell, and a base support; wherein: the atomizing assembly A is disposed on the battery assembly B; the first seal ring is disposed on the seal holder; the seal holder is inserted in the mouthpiece; the joint is fixed on the insulation seat; the insulation seat is disposed in the first fixed seat; the silica ring and the regulating ring are disposed on the first fixed seat; the atomizing core is inserted in the first fixed seat; the fixed screw is disposed on a bottom wall of the e-liquid container; the mouthpiece is disposed on the e-liquid container; the mouthpiece cover is disposed on the mouthpiece; the first fixed seat is fixed on the fixed screw; the second seal ring and the first spring are disposed on one end of the e-liquid feeder, and the e-liquid guider is disposed on the other end of the e-liquid feeder; the e-liquid feeder is fixed on the e-liquid container; the plug is inserted in the e-liquid container; and the mouthpiece cover covers the e-liquid container; the regulating ring comprises locating slots, and the first fixed seat comprises stop pins corresponding to the locating slots; the second springs are disposed in the switch buttons, and the switch buttons are fixed on two sides of the second fixed seat; the button cap is disposed in the decoration ring; and the decoration ring is fixed on the switch buttons; the mainboard and the battery cell are disposed in the base support; the third seal ring and the third springs are disposed on the output electrodes; the output electrodes is fixed on the second fixed seat via the fixed rings; the second fixed seat is disposed in the base support; and the decoration cover is attached to the second fixed seat; the silica plug is disposed on the mainboard; the light guide is disposed in the button, and the button is fixed on the second fixed seat. an atomizing assembly, the atomizing assembly comprising a mouthpiece cover, a mouthpiece, a seal holder, a first seal ring, an atomizing core, a silica ring, a first fixed seat, a joint, an insulation seat, a regulating ring, a fixed screw, an e-liquid container, an e-liquid feeder, a second seal ring, a first spring, an e-liquid guider, and a plug; and a battery assembly, the battery assembly comprising a button, a decoration cover, second springs, switch buttons, a decoration ring, a button cap, a light guide, a second fixed seat adapted to fixing a printed circuit board, output electrodes, a third seal ring adapted to seal the output electrodes, third springs, fixed rings adapted to fix the output electrodes, a silica plug, a mainboard, a battery cell, and a base support; the atomizing assembly A is disposed on the battery assembly B; the first seal ring is disposed on the seal holder; the seal holder is inserted in the mouthpiece; the joint is fixed on the insulation seat; the insulation seat is disposed in the first fixed seat; the silica ring and the regulating ring are disposed on the first fixed seat; the atomizing core is inserted in the first fixed seat; the fixed screw is disposed on a bottom wall of the e-liquid container; the mouthpiece is disposed on the e-liquid container; the mouthpiece cover is disposed on the mouthpiece; the first fixed seat is fixed on the fixed screw; the second seal ring and the first spring are disposed on one end of the e-liquid feeder, and the e-liquid guider is disposed on the other end of the e-liquid feeder; the e-liquid feeder is fixed on the e-liquid container; the plug is inserted in the e-liquid container; and the mouthpiece cover covers the e-liquid container; the regulating ring comprises locating slots, and the first fixed seat comprises stop pins corresponding to the locating slots; the second springs are disposed in the switch buttons, and the switch buttons are fixed on two sides of the second fixed seat; the button cap is disposed in the decoration ring; and the decoration ring is fixed on the switch buttons; the mainboard and the battery cell are disposed in the base support; the third seal ring and the third springs are disposed on the output electrodes; the output electrodes is fixed on the second fixed seat via the fixed rings; the second fixed seat is disposed in the base support; and the decoration cover is attached to the second fixed seat; the silica plug is disposed on the mainboard; the light guide is disposed in the button, and the button is fixed on the second fixed seat.