A lifting and horizontal-moving two-layer overpass garage stretching across a road stretches across the road and is built in an idle space located above the road by a certain height to the pavement. The garage has a car parking and driving function and a function allowing pedestrians to go across the road. Lifting elevators are mounted on both sides of the road, cars can be turned on rotary discs and can be parked and driven on both sides of the road, and thus the cars can move in the garage and cross the space above the road to change the running direction, and the road jamming problem is effectively solved; and accordingly, the three problems of difficult parking, difficult garage construction and difficulty in road passing of pedestrians in cities can be solved simultaneously.