A backlight module includes at least one light-emitting group, each of which comprises a main drive unit provided with a plurality of main signal transmission channels and a plurality of groups of light-emitting units. Each of the main signal transmission channels is connected to a group of the light-emitting units. The backlight module further includes an auxiliary drive unit and a controller connected to the main drive unit and the auxiliary drive unit. The auxiliary drive unit provided with a plurality of auxiliary signal transmission channels and the main drive unit are connected in parallel, the auxiliary signal transmission channels and the main signal transmission channels are arranged in parallel in one-to-one correspondence and connected to the group of light-emitting units. The controller is configured to control operating states of the main signal transmission channel and the auxiliary signal transmission channel according to a refresh frequency and gray-scale data.