The invention discloses an efficient cultivating apparatus for garden afforesting plants. The efficient cultivating apparatus comprises an outer shell, a planting bush and a water jacket, and is characterized in that the front side of the outer shell is provided with a door plate, the outer shell is inside provided with the water jacket, the upper part of the heat-preservation outer shell is fixedly provided with a water tank and a liquid fertilizer tank, the bottoms of the water tank and the liquid fertilizer tank both communicate with a watering pipe via pipes, the bottom of the watering pipe is provided with watering branch pipes, planting barrels are arranged on the bottom plate of the outer shell, outlets of the watering branch pipes are above the planting barrels, a drainage ditch is arranged at the bottoms of the planting barrels, the top inside of the outer shell is provided with humidifying spraying nozzles, and the upper part of the outer shell is provided with a thermometer and a hygrometer. The efficient cultivating apparatus has the advantages of being simple in structure and resource-saving, and is capable of effectively promoting growth of plant seedlings and improving the survival rate.