The invention relates to an electronic cigarette and an atomization device thereof. The atomization device comprises a smoke channel, a juice storage cavity, a juice guide pipe and a heating piece, wherein the smoke channel is used for smoke to pass through, the juice storage cavity is separated from the smoke channel and used for storing tobacco juice, the juice guide pipe is arranged transversely relative to the smoke channel and comprises a first section and a second section communicated with the first section, the first section is communicated with the juice storage cavity, the second section is located in the smoke channel and comprises multiple juice outlets which are formed in the side wall of the second section and used for the tobacco juice to ooze out from inside to outside, the juice guide pipe is a hollow meshed pipe, the meshes of the meshed pipe form the juice outlets, and the heating piece is arranged on the second section to heat and atomize the tobacco juice oozed out from the juice storage cavity. The juice outlets are formed in the second section, located in the smoke channel, of the juice guide pipe, the tobacco juice oozes outside the juice guide pipe from the juice outlets through an inner pipe of the juice guide pipe, the juice guide speed of the juice guide pipe can be increased, and the smoke volume of the atomization device is increased.