The application of industrial robot in the refrigerator compressor crankshaft grinding processing production was introduced, and the refrigerator compressor crankshaft grinding robot automatic production line was developed based on industrial robots, conveyer line and grinding machining. Because of the high requirement of the refrigerator compressor crankshaft feeding in grinding, there weren’t any production lines using robots instead of artificial feeding yet, so that feeding with robots was the largest difficulty of the production line. The application of robots floating function in the crankshaft grinding feeding was importantly introduced, and the appropriate feeding floating forces of the robot was found after lots of experiments. After the pilot run, feeding with robots absolutely meets the artificial standard and the production line can be used to implement flexible automatic production. 