Boom sprayer

The invention relates to a boom sprayer, which comprises a sprayer body, and the sprayer body comprises a frame, walking wheels and a power device for driving the walking wheels. A spraying rod assembly comprises at least one spraying rod body, a first rotating part or a sliding part is connected between the spraying rod body and the frame, the rotating center of the first rotating part is in the vertical direction, and the sliding direction of the sliding part is the front-back direction of the frame; the spraying rod body can rotate around the rotating center of the first rotating part or slide in the sliding direction of the sliding part, and a power wheel is arranged at the bottom of the spraying rod body. The spraying rod body is supported to walk through the power wheels, and the length of the spraying rod body can be set to be large; and the structural strength design requirements of the spraying rod body and the frame are reduced. The problem that when a traditional spraying machine walks to the next