The invention relates to a knowledge extension rehabilitation training system which comprises a machine body, a first display module, a second display module and a main control panel, wherein the first display module comprises a first shell, a first touch screen and a first display screen; the second display module comprises a second shell, a second touch screen and a second display screen; the first shell is connected with the machine body by a lifting mechanism; the first touch screen, the first display screen, the second touch screen, the second display screen and an IC (integrated circuit)card reader are respectively connected with the main control panel. In the system, the touch screens and the display screens are used for selecting a training module and displaying images used for training demonstration for autistic children to view, a touch signal input by a user is received, and the images used for training demonstration and displayed on a capacitive touch screen is updated according to the touch signal, so that different knowledge extension contents are demonstrated for the autistic children, and the efficiency of knowledge extension rehabilitation training of the autisticchildren is improved.