The invention discloses a garden greening efficient watering and fertilization integrated device which comprises a bottom plate, a water and fertilizer box, a motor, a threaded rod, a sleeve, a firstrotating shaft, a first gear, a first rack, a stirring rod, a first spring, a grinding ball, a movable cam, a cylinder, a piston rod, a second spring, a pulley, another movable cam, an electric push rod, a second rotating shaft, a sprayer, a second gear and a second rack. By coordination of the motor, the sleeve, the threaded rod, the first gear, the first rack, the first spring and the grinding ball, the stirring rod is driven to vertically move and continuously rotate, water and solid fertilizers are sufficiently stirred, so that the solid fertilizers are more effectively dissolved in the water, and the preparation efficiency of water and fertilizer solution is improved. By coordination of the electric push rod, the movable cams, the piston rod, the cylinder, the pulley, a piston and thesecond spring, the sprayer is driven to continuously rotate forwards and reversely, spraying range is widened, and working efficiency is improved.