The present invention provides a fluid-passing type sterilization device, comprising a housing, a sterilization light source, and a connection structure, wherein the housing comprises a first housing body and a second housing body, and the first housing body and the second housing body are hermetically jointed and form an enclosed cavity together； the housing is provided with a liquid inlet hole and a liquid outlet hole, and the liquid inlet hole and the liquid outlet hole are both in communication with the cavity； the connection structure is fixed inside the cavity of the housing； the sterilization light source is mounted on the connection structure； the front surface of the sterilization light source has a first channel allowing a fluid to pass through, and the rear surface of the sterilization light source has a second channel allowing the fluid to pass through； and the first channel and the second channel are both located inside the cavity and communicate with each other. The fluid flows through the back surface of the sterilization light source while the sterilization device performs sterilization, so that the sterilization light source can be cooled by using the fluid, the installation of a fan or a heat dissipation device is omitted, the structure of the sterilization device is simplified, and the miniaturization of the sterilization device is implemented； meanwhile, power consumption is reduced and costs are saved.La présente invention concerne un dispositif de stérilisation de type à passage de fluide, comprenant un boîtier, une source de lumière de stérilisation et une structure de connexion, le boîtier comprenant un premier et un second corps de boîtier, et le premier et le second corps de boîtier sont hermétiquement joints et forment ensemble une cavité fermée ； le boîtier est pourvu d'un orifice d'entrée de liquide et d'un orifice de sortie de liquide, et l'orifice d'entrée de liquide et l'orifice de sortie de liquide sont tous deux en communication ave
