A small-sized essential oil atomization device comprises an atomization chamber (3), an atomization cavity (2), a spraying head (1), a siphon (10), an air pump (6), and a connecting support (13). A lower part of the atomization chamber is fixedly connected to a bottle opening of a liquid bottle (5), the spraying head, and the atomization cavity. The spraying head is fixedly disposed at an upper part in the atomization cavity. The atomization cavity is disposed at an upper part of the bottle opening of the liquid bottle. One end of the siphon (10) is fixedly disposed on the spraying head, and the other end of the siphon (10) is inserted into the liquid bottle through the atomization cavity. The middle of the atomization chamber is separated into two layers by a separation plate (17). Fog through holes (18) are formed on the separation plate so that the two layers are communicated. A fog outlet (12) is formed on a cover plate of the atomization chamber. The air pump is fixedly disposed on the connecting support. The air pump is connected to the spraying head by using a hose (7). With the essential oil atomization device, essential oil is thoroughly atomized, essential oil particles are finer, and diffusion is easier, integrally having beneficial effects that the product size is small, the conversion rate is high, the essential oil consumption is reduced, the fragrance spreading is fast, and the fragrance spreading range is wide.Linvention concerne un dispositif datomisation dhuile essentielle de petite dimension, qui comprend une chambre datomisation (3), une cavité datomisation (2), une tête de pulvérisation (1), un siphon (10), une pompe à air (6) et un support de raccordement (13). Une partie inférieure de la chambre datomisation est reliée de façon fixe à une ouverture dune bouteille de liquide (5), la tête de pulvérisation, et la cavité datomisation. La tête de pulvérisation est disposée de façon fixe au niveau dune partie supérieure dans la cavité datomisation.