Spraying arm with adjustable rotating speed and cleaning machine

The utility model relates to a spray arm with adjustable rotating speed and a cleaning machine, in the spray arm with adjustable rotating speed, a flow channel is arranged in a shell, a spray hole is further arranged on the shell, a driving hole is arranged on the shell and can drive the shell to rotate, and the flow channel is communicated with the flow channel. The sliding block is arranged in the shell and can slide back and forth between the initial position and the driving hole in the length direction of the shell, the adjusting piece acts on the sliding block so that the sliding block can be reset to the initial position, and due to the fact that the sliding block can slide in the length direction of the shell, the sliding block can be driven by the centrifugal effect generated in the rotating process of the spraying arm to slide. Therefore, during design, the rotating speed of the spraying arm can be adjusted according to different use scenes by adjusting the initial position of the sliding block and t