An electronic apparatus wind guide facility includes an air deflector, an air eflector set is arranged on the air deflector of a side wall with air holes of a casing. The air deflector includes a deflector body provided with a plurality of wind guide channels, each of wind guide channels is formed by a plurality of wind guide walls, two ends of each wind guide channel form an air inlet and an airoutlet corresponding to air holes of the casing, the cross section area of each wind guide wall parallel with the deflector body is increscent in the direction from the air inlet to corresponding airoutlet. The electronic apparatus wind guide facility can reduce windage resistance, make airflow flow through the air holes of the casing with fluency, thereby improving radiating efficiency.