Abstract: A light-emitting device, a display apparatus and a backlight apparatus are provided. The light-emitting device includes a sub-light-emitting unit. The sub-light-emitting unit includes: a first semiconductor layer; a second semiconductor layer, stacked with the first semiconductor layer and having a material different from a material of the first semiconductor layer; a light-emitting layer, located between the first semiconductor layer and the second semiconductor layer; a current spreading layer, located on a side of the first semiconductor layer away from the second semiconductor layer; and an insulating layer, located between the current spreading layer and the first semiconductor layer. The current spreading layer and the second semiconductor layer are electrically connected with the first semiconductor layer through a via hole penetrating the insulating layer.