A ceramic heater is installed inside the SL-20CMC ceramic temperature-control solder iron, which is modified from SL-20,and the temperature adjustment is more accurate. There are 12 LED displays on the panel of the SL-20CMC temperature-control soldering iron station thus making the temperature adjustment ranging from 150C to 420C,such an adjustment range is very suitable for the engineers to perform maintenance work, factory soldering and welding work and is also good for doing household works.