A light-emitting plate (10) and a preparation method therefor, a backlight module and a display apparatus. The light-emitting plate (10) comprises: a circuit board (11), comprising a substrate layer (111) and a circuit layer (112), wherein the circuit layer (112) is attached to one side surface of the substrate layer (111), the other side surface of the substrate layer (111) is a light-emitting surface (13), and through holes (113) are formed in the circuit board (11); and light-emitting devices (12), each comprising a fixed part (21) and an LED light-emitting unit (122), wherein the LED light-emitting unit (122) is fixed on the fixed part (21), the light-emitting devices (12) are arranged corresponding to the through holes (113), the fixed parts (21) are arranged on one side of the circuit layer (112), and the LED light-emitting units (122) face the light-emitting surface (13) by means of the through holes (113).