The invention belongs to the field of optoelectronic devices and discloses a Ce 3+ A halide-based electroluminescent device, which comprises a top electrode, a hole injection layer, a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer and a bottom electrode from top to bottom, wherein the light emitting layer adopts The material is Ce 3+ Based halide materials, the general structure of which is A m Ce n x k , wherein A is one or more of Na, K, Rb, and Cs, X is one or more of Cl, Br, and I, and the chemical valence state of Ce is +3, m+3n=k; the Ce-like halide materials have high photoluminescence efficiency, excellent thermal stability and short excited state lifetime, and can be used in electroluminescent devices. The hole transport layer and the electron transport layer are used to inject holes and electrons into the light emitting layer, respectively. The electroluminescent device has the characteristics of simple preparation process, lower cost and low toxicity.