Abstract: A modular air outlet assembly comprises at least two air outlet sub-modules and a housing connecting member, wherein each of the air outlet sub-modules have different functions and are matchingly engaged in a sealed manner, and the air outlet sub-modules comprise a front sub-module and a rear sub-module; the front sub-module comprises a front housing and a front functional component, and the front housing has a standard air inlet joint; the rear sub-module comprises a rear housing and a rear functional component, and the rear housing has a standard air outlet joint and a standard air duct opening joint. A modular approach is used to design the air outlet assembly, and the relative angle between the air outlet sub-modules can be adjusted by means of different housing connecting members to avoid installation limitations in vehicles, and the mold development cost and related costs are reduced.