Fixed-point spraying equipment and method

The invention discloses fixed-point spraying equipment. The equipment comprises a cleaning tank with an opening in the top, a conveying mechanism used for conveying an to-be-cleaned object, a fixed-point spraying mechanism and a lifting mechanism connected with the fixed-point spraying mechanism and used for driving the fixed-point spraying mechanism to move up and down in the cleaning tank; and the fixed-point spraying mechanism comprises a first spraying station, the first spraying station is provided with multiple of first spraying nozzles, at least one spraying water pipe extending downwards is arranged on at least one of the two sides of the first spraying station, the extending tail ends of the spraying water pipes are bent towards the interior of the fixed-point spraying mechanism to form a second spraying station, and the second spraying station is provided with at least one second spraying nozzle. According to the fixed-point spraying equipment, aluminum skimmings in the innerwall, a threaded hole an