Disclosed are a backlight module and a display apparatus. The backlight module includes an infrared light source, an optical fiber and a conversion component. The infrared light source is connected with an input end of the optical fiber and configured to provide infrared light to the input end of the optical fiber. An output end of the optical fiber is connected with the conversion component and configured to transmit the infrared light to the conversion component. The conversion component includes a tube body, and a plurality of light emitting elements are arranged along an extending direction of the tube body successively in the tube body. The light emitting elements are configured to emit visible light under the irradiation of the infrared light.