The present invention provides a light-emitting component for a backlight module, which comprises a first positive input end, a first negative input end and a plurality of branches connected in parallel therebetween, each of the plurality of the branches comprising a plurality of LEDs connected in series, wherein, in the case that the numbers of LEDs in the respective branches are not exactly the same, a voltage divider is connected in series in at least one of the branches so that currents flowing through respective branches are the same. Correspondingly, the present invention further provides a backlight module and a liquid crystal display device. In the present invention, any number of LEDs can be provided in each of the branches in the light-emitting component, which expands the irradiation scope of light, guarantees the safe distance between adjacent LEDs, and further improves product quality.