Disclosed is a fragrance diffusion machine, comprising: a liquid storage device (100), an outer shell (200) provided with an installation cavity (220), an air supply device (300) and a sealing member (400), wherein the outer shell (200) covers and is arranged on the liquid storage device (100), the air supply device (300) and the liquid storage device (100) are both arranged inside the installation cavity (220) and are in communication with each other, the air supply device (300) and the liquid storage device (100) cooperate with the outer shell (200) to form an air returning channel (500), the sealing member (400) is arranged between the liquid storage device (100) and the air supply device (300), and the sealing member (400) is located on the air returning channel (500) and abuts against the outer shell (200) in a sealed manner. Blocking the air returning channel (500) via the sealing member (400), avoids aromatherapy gas generated by the fragrance diffusion machine from flowing back into the air supply device (300) from the air returning channel (500), reducing the concentration of the aromatherapy gas released into the environment, thereby affecting the usage effect of the fragrance diffusion machine, and at the same time, preventing acidic aromatherapy gas from entering the air supply device (300) and corroding a structural component.L'invention concerne une machine de diffusion de parfum, comprenant : un dispositif de stockage de liquide (100), une coque externe (200) présentant une cavité d'installation (220), un dispositif d'alimentation en air (300) et un élément d'étanchéité (400), la coque externe (200) recouvrant le dispositif de stockage de liquide (100) et étant disposée sur ce dernier, le dispositif d'alimentation en air (300) et le dispositif de stockage de liquide (100) étant tous deux disposés à l'intérieur de la cavité d'installation (220) et étant en communication l'un avec l'autre, le dispositif d'alimentation en air (300) et le dispositif de st
