The invention relates to a city green wall with a high-efficient power generating capability used in a desert area. The city green wall comprises a wall body, a power generation device and a direction adjusting mechanism. The power generation device comprises a solar panel, a dedusting mechanism, two mobile mechanisms and several hinged units. Each mobile mechanism comprises a side plate, a conveyor belt, a support and two mobile units. The direction adjusting mechanism comprises a third driving motor, a connecting rod, a slide ring, a slide rod, a top rod, a pillar, a fixed ring, a support frame and two vertical rods. The city green wall with the high-efficient power generating capability used in the desert area can adjust a direction of the solar panel according to a direction of sunlight through the direction adjusting mechanism so that the solar panel directly faces sunlight and a power generating capability of the power generation device is increased. The mobile mechanisms drive the dedusting mechanism to move, and simultaneously the dedusting mechanism drives a hairbrush on a first driving shaft to rotate so that the hairbrush removes dust, the solar panel can normally receive the sunlight and the power generating capability is guaranteed.