Foldable display device, electronic equipment with same and control method of foldable display device

The invention relates to a foldable display device. The foldable display device comprises a first display screen (1), a second display screen (2), a third display screen (3), a first connecting unit (5) and a second connecting unit (6), wherein the first connecting unit (5) is used for connecting the first display screen and the second display screen, and the second connecting unit (4) is used for connecting the second display screen and the third display screen. According to the foldable display device provided by the invention, the foldable display device which can be used for electronic devices of a mobile phone, a wearing device or a tablet computer and the like is provided and the foldable display device has the characteristics that the carrying is convenient, the screen size can be switched, the power consumption is low, and the standby time is long.