The present application discloses a backlight module and a display device. The backlight module includes a plurality of light-emitting units, a plurality of drive chips, a plurality of cascaded voltage comparators, and a voltage adjustment module. The light-emitting unit connected to a control terminal of a same drive chip is connected with a same initial drive voltage. The plurality of cascaded voltage comparators output an adjustment voltage in a N-th stage based on a preset voltage and a plurality of to-be-detected voltages. The voltage adjustment module is configured to adjust the initial drive voltage based on the adjustment voltage in the N-th stage.