Vehicle-mounted display device and vehicle

The invention discloses a vehicle-mounted display device and a vehicle, and belongs to the technical field of vehicle-mounted display. The vehicle-mounted display device comprises a flexible display module, the flexible display module comprises a fixing part, a first bending part and a second bending part, the fixing part is connected to the first surface of a seat armrest, and the first bending part and the second bending part are movably connected to the two ends of the fixing part in the first direction respectively; in the first state, the display area, parallel to the first surface, of the flexible display module is larger than the area of the orthographic projection, on the first surface, of the fixed part, and in the second state, the display area, parallel to the first surface, of the flexible display module is equal to the area of the orthographic projection, on the first surface, of the fixed part. Wherein the first surface is the surface where the top of the armrest is located, the first surface is