A backlight bar includes a flexible circuit board and backlight lamp, the flexible circuit board includes a circuit board base and an electrostatic shielding structure, the electrostatic shielding structure is disposed on a first surface of the circuit board base and located in a non-marginal region, and the backlight lamp disposed on a second surface of the circuit board base, the first surface disposed opposite to the second surface. A backlight module and a display device are also provided.