The utility model relates to a kind of cleaning machines, including box and spray arm, further include: positioning rod, lower end is constrained to the bottom of box, upper end is located above spray arm by passing through spray arm;Positioning cap, be equipped in the top of positioning rod, positioning cap and positioning rod between being provided with the connecting structure that can make both locking positioning or turn over certain angle;Moving part, pass through positioning cap arrangement and can reciprocate along the radial direction of positioning cap;Coil, be equipped on spray arm and be close to positioning rod arrangement;Magnetic member, with moving part is connected and adjusts the distance between coil with the movement of moving part.Cleaning program runs before, utensil that needs to be strengthened wash is placed in specific area, when cleaning program runs, spray arm is rotated to specific area each time, attraction is generated between coil and magnetic member, spray arm rotating speed will slow down, to extend the spray time of this area, improve the cleaning intensity of specific area, to meet the demand for specific area strengthening wash in turn.
