Disclosed are an electronic cigarette and an atomization device thereof. The atomization device comprises a housing, a fluid storage chamber (115) arranged inside the housing, and a regulating valve (13) fitted with the housing. The housing is provided with a fluid injecting channel (1131) for injecting tobacco fluid into the fluid storage chamber (115). The regulating valve (13) is provided with a first opening (1311) corresponding to the fluid injecting channel (1131). The regulating valve (13) is movable between a first position and a second position along the surface of the housing. When the regulating valve (13) is in the first position, the first opening (1311) is in communication with the fluid injecting channel (1131) to open the fluid injecting channel (1131). When the regulating valve (13) is in the second position, the first opening (1311) is misaligned with the fluid injecting channel (1131) to close the fluid injecting channel (1131). With regard to the atomization device of the electronic cigarette, by moving the regulating valve (13) between the first position and the second position, the communication between the first opening (1311) of the regulating valve (13) and the fluid injecting channel (1131) and the closing of the fluid injecting channel (1131) are achieved, so that a secondary fluid injection is facilitated and fluid injection can be achieved without removing the cigarette holder. This is convenient and efficient, and can also prevent the cigarette holder from being contaminated or lost when same is removed.La présente invention concerne une cigarette électronique et son dispositif d'atomisation. Le dispositif d'atomisation comporte un boîtier, une chambre de stockage de fluide (115) disposée à l'intérieur du boîtier, et une valve de régulation (13) montée avec le boîtier. Le boîtier comporte un canal d'injection de fluide (1131) servant à injecter du fluide de tabac dans la chambre de stockage de fluide (115). La valve de régulation (13) c
