The invention discloses an energy-saving process for preparing clean fuel gas from coal. The energy-saving process comprises the following steps: gasifying crushed coal, pumping out crude coal gas with a volume ratio of 5-60% when gasified crushed coal passes through a crude coal gas lead-out device (3) at the middle part of a gasification chamber, and feeding the crude coal gas treated by a washing and cooling tower I (5) into a waste heat boiler I (8) for recycling waste heat; and leading out the rest crude coal gas with the volume ratio of 40-95% by virtue of a coal gas channel III on a double-channel static coal distributor (2), passing through a washing and cooling tower II (6), then performing waste heat recovery in the waste heat boiler I (8), finally cooling the crude coal gas, feeding the crude coal gas (18) with concentrated liquid separated by a gas-liquid separator (11) to a downstream working procedure, and feeding washed concentrated liquid to a coal gas and water separation device (15) for recycling. The energy-saving process disclosed by the invention has the advantages of energy conservation, low running cost, less coal dust bring-out amount and less tar-containing coal gas and water.