The present invention is a piezoelectric substrate (1), an insulating film (2), a first finger-shaped transducer (31) and a second finger-shaped transducer (32), a reservoir (Reservoir) (4), the flow path (5) and tobacco liquid Disclosed is an electronic cigarette tobacco liquid supply device including an outlet (7). The present invention further discloses a tobacco liquid supply method using an electronic cigarette tobacco liquid supply device. The electronic cigarette tobacco liquid supply device according to the present invention has a small volume, the tobacco liquid supply speed is stable and uniform, and the speed can be controlled.
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