The invention relates to a spraying arm device of a baby ware washing machine. The spraying arm device comprises a spraying arm upper piece and a spraying arm lower piece which are each provided with a half pipe wall. The half pipe wall of the spraying arm upper piece and the half pipe wall of the spraying arm lower piece are folded together to form a water channel after the spraying arm upper piece and the spraying arm lower piece are connected. The spraying arm upper piece is provided with a plurality of water spraying openings which are communicated with the water channel. A water inlet is formed in the spraying arm lower piece and communicated with the water channel. Water blocking protrusions are arranged on the inner surface of the half pipe wall of the spraying arm lower piece and located below the water spraying openings. Vortex grooves are formed in the peripheries of the water blocking protrusions. One part of water rebounds out of the water spraying openings after hitting the highest points of the water blocking protrusions, the other part of water rebounds out of the water spraying openings after hitting the water blocking protrusions and flowing into the vortex grooves, water is sprayed out of the water spraying openings in a dispersed mode, the water spraying openings are formed in bosses of different angles and heights, finally water sprayed out of the water spraying openings are sprayed out in a dispersed mode at different angles and different heights to wash baby ware, and the aims of saving water and being efficient in washing are achieved.