The invention provides a traffic guidance facility based on traffic safety and suitable for foggy days. The traffic guidance facility comprises a support body. The support body comprises a first support and a second support, the traffic guidance mechanism comprises a cross beam frame, first connecting cylinders, driving cylinders, external connecting plates, a fork red light module, an arrow greenlight module and a plastic blocking rod, and the two ends of the cross beam frame are fixedly connected with the first connecting cylinders respectively; the fork red light module is installed on theouter connecting plate on the end face opposite to the plastic blocking rod, the arrow green light module is installed on the outer connecting plate on the other two end faces, a linkage gear is further fixedly installed on the driving cylinder, and the linkage gear is connected with the driving gear in a meshed mode. The plastic blocking rod is lifted to be horizontal through the stepping motorso as to facilitate passing of vehicles, when the stepping motor drives the plastic blocking rod to return to the vertical state, straight going of the vehicles is blocked, the sight of a driver can be increased through the mark structure illuminated by the yellow warning lamp column and the yellow flashing lamp beads, and use under the foggy day condition is better facilitated.