Disclosed is a vehicle-mounted aroma diffuser comprising a main unit shell, an integral vehicle charging plug support, a motor, a fan, a main unit circuit board, an atomizer and a water tank. The integral vehicle charging plug support and the main unit shell of the vehicle-mounted aroma diffuser are integrally and rotatably connected, the angle of the aroma diffuser can be adjusted according to actual requirements when the aroma diffuser is in use, the disordered wiring method of traditional split-type vehicle charger supports can be changed, the space in the vehicle is cleaner and tidier, and usage is more convenient through the integral instant-plugging design.
