An electronic cigarette, comprising: a mouthpiece assembly, an atomization assembly and a base assembly; the mouthpiece assembly comprising: 1) a mouthpiece; 2) a limited post; 3) a spring; 4) a fixed ring; 5) an upper cover that is rotatable; 6) a silicone ring; 7) a cylindrical casing; 8) a glass tube; 9) a lower cover; the atomization assembly comprising: 10) a first electrode; 11) a first sealing joint; 12) a first heating wire; 13) a first piece of cotton; 14) a first fixed seat; 15) a sleeve; 16) a second fixed seat; 17) a second piece of cotton; 18) a second heating wire; 19) a second sealing joint; 20) a second electrode; the base assembly comprising: 21) a joint; 22) a seal ring; and 23) a base cover; wherein: the limited post is disposed in the spring; the cylindrical casing comprises a flange provided with a locating hole; and the spring is embedded in the locating hole; the fixed ring is disposed in the upper cover to control the rotation of the upper cover; the silicone ring is disposed on the cylindrical casing; the upper cover is disposed on the silicone ring; the cylindrical casing is nested in the glass tube; the lower cover is in threaded connection to the cylindrical casing and is disposed on one end of the glass tube; the mouthpiece is disposed on the fixed ring; the first piece of cotton wraps the first heating wire; the first electrode is disposed on the first sealing joint; the first heating wire and the first sealing joint are disposed on two ends of the first fixed seat, respectively; the first fixed seat is disposed in an upper part of the sleeve; the second piece of cotton wraps the second heating wire; the second electrode is disposed on the second sealing joint; the second heating wire and the second sealing joint are disposed on two ends of the second fixed seat, respectively; the second fixed seat is disposed in a lower part of the sleeve; and the seal ring is sheathed on the joint; and the base cover comprises a central hole and the seal ring and the joint are disposed in the central hole. 1) a mouthpiece; 2) a limited post; 3) a spring; 4) a fixed ring; 5) an upper cover that is rotatable; 6) a silicone ring; 7) a cylindrical casing; 8) a glass tube; 9) a lower cover; 10) a first electrode; 11) a first sealing joint; 12) a first heating wire; 13) a first piece of cotton; 14) a first fixed seat; 15) a sleeve; 16) a second fixed seat; 17) a second piece of cotton; 18) a second heating wire; 19) a second sealing joint; 20) a second electrode; 21) a joint; 22) a seal ring; and 23) a base cover; the limited post is disposed in the spring; the cylindrical casing comprises a flange provided with a locating hole; and the spring is embedded in the locating hole; the fixed ring is disposed in the upper cover to control the rotation of the upper cover; the silicone ring is disposed on the cylindrical casing; the upper cover is disposed on the silicone ring; the cylindrical casing is nested in the glass tube; the lower cover is in threaded connection to the cylindrical casing and is disposed on one end of the glass tube; the mouthpiece is disposed on the fixed ring; the first piece of cotton wraps the first heating wire; the first electrode is disposed on the first sealing joint; the first heating wire and the first sealing joint are disposed on two ends of the first fixed seat, respectively; the first fixed seat is disposed in an upper part of the sleeve; the second piece of cotton wraps the second heating wire; the second electrode is disposed on the second sealing joint; the second heating wire and the second sealing joint are disposed on two ends of the second fixed seat, respectively; the second fixed seat is disposed in a lower part of the sleeve; and the seal ring is sheathed on the joint; and the base cover comprises a central hole and the seal ring and the joint are disposed in the central hole.