The invention discloses a water spraying device for municipal gardens. The water spraying device comprises a box shell of which the inner top is provided with a connecting groove, and a base which is in rotating fit connection with the bottom of the box shell, wherein a connecting plate is arranged in the connecting groove; a nozzle is arranged on the front end face of the connecting plate; a first adapter shaft and a second adapter shaft are separately arranged on the left and right sides of the connecting plate; the tail on the left side of the first adapter shaft is in rotating fit connection with a first sliding connection block; an empty groove is formed in the first sliding connection block; a third tooth disc fixedly connected with the first adapter shaft is arranged in the empty groove; the tail on the right side of the second adapter shaft is in rotating fit connection with a second sliding connection block; groove parts are correspondingly formed in the tops of the inner walls on the left and right sides of the connecting groove; a first accommodating cavity is arranged in the position on the side, where the left groove part is away from the connecting groove, of the box shell; a second accommodating cavity is arranged in the position, below the first accommodating cavity, in the box shell; a third accommodating cavity is arranged in the position, on the right side of the second accommodating cavity, in the box shell; a shaft rod which extends left and right is arranged in the third accommodating cavity; and the right side end of the shaft rod is connected with a first motor.