Disclosed in the embodiments of the present disclosure are a blue-light-emitting device and a manufacturing method therefor, and a display apparatus. The blue-light-emitting device comprises a hole transport layer, an electron blocking layer and a light-emitting layer, which are arranged in a stacked manner, wherein the electron blocking layer comprises a first material and a second material, the mobility of the first material is a first mobility, and the mobility of the second material is a second mobility; and the mobility of the hole transport layer is greater than the mobility of the first material, and the mobility of the hole transport layer is greater than the mobility of the second material; and the general structural formula of the material of the hole transport layer is formula (I), the general structural formulae of the first material and the second material are both formula (II), the first material and the second material have different bond energies, and n is equal to 0 or 1.