A backlight module, including: a first base, a mini light-emitting diode chip array, an encapsulation layer covering the mini light-emitting diode chip array and a superlens array sequentially arranged on a first substrate; and a second base, a wire grate array and a prism structure sequentially arranged on a second substrate. The superlens array, the wire grate array and the prism structure include a plurality of superlenses, a plurality of wire grates and a plurality of prism groups, respectively. The second base is a glass base, orthographic projections of the plurality of wire grates on the first base at least partially overlap with the orthographic projections of the plurality of superlenses on the first base, respectively, and orthographic projections of the plurality of prism groups on the first base are located between the orthographic projections of two adjacent wire grates on the first base, respectively.