1. A display box, comprising:a box body; and
a first support plate detachably connected with the box body, the first support plate being one of a plurality of first support plates with different sizes, the plurality of first support plates being selectively and detachably connected with the box body for supporting flexible screens with different bending radii;
wherein a first opening is defined in an upper surface of the box body, the first support plate is disposed in the first opening, and the first support plate and the upper surface of the box body has a preset angle defined therebetween, and;
wherein the box body comprises a system mainboard connected with the flexible screen via the first opening, and the system mainboard comprises a control module controlling the flexible screen to display.