The embodiment of the invention provides a terminal display screen assembly and a mobile terminal. The terminal display screen assembly comprises a display screen, a first light-transmitting cover plate, a shading piece and a second light-transmitting cover plate. The display screen is provided with a first through hole penetrating through the display screen in the thickness direction; the first light-transmitting cover plate covers the display screen and is provided with a second through hole penetrating through the first light-transmitting cover plate in the thickness direction of the firstlight-transmitting cover plate, and the size of the second through hole is larger than that of the first through hole so that a step face can be formed on the display screen. The shading part is madeof shading materials and provided with a bottom wall and a side wall, the side wall surrounds the bottom wall to form a containing space, the side wall is adjacent to the first light-transmitting cover plate, the bottom wall is arranged on the step face, the bottom wall is provided with a third through hole penetrating through the bottom wall in the thickness direction of the bottom wall, and thethird through hole, the second through hole and the first through hole are communicated; the second light-transmitting cover plate is arranged in the containing space so as to cover the first throughhole and the third through hole. According to the embodiment of the invention, the display area of the terminal display screen assembly can be increased.