The invention provides a garden device for spraying water on lawns. The garden device comprises a first box with an opening in the bottom and a second box body with an opening in the bottom. Through grooves are formed in the opposite sides of the first and second boxes respectively, first ring gears are vertically and fixedly installed on the inner wall on the other side of the first box and on the inner wall on the other side of the second box respectively, and the circle centers of the two first ring gears are located at the same horizontal axis. First rotary shafts with motors are movably installed on the inner wall on the other side of the first box and on the inner wall on the other side of the second box respectively, each first rotary shaft is located in the circle center of the corresponding ring gear, and the motors of the two first rotary shafts are fixedly arranged on the inner wall of the first box and the inner wall of the second box respectively. By means of the garden device for spraying the water on the lawns, water can be sprayed on the lawns in a small garden and the lawns in a large garden, different types of water spraying requirements are met, and the problemsthat manual spraying is conducted in the small garden, the labor intensity is high, when embedded pipes are adopted in the small garden, the cost is high, and a sprinkler cannot enter due to narrow roads.