The utility model discloses a humus soil and plastics concurrent processing system on cement kiln in old rubbish, including old garbage sieving equipment, waste incinerator, humus soil predrying device and the hot desorption apparatus of humus soil, the waste incinerator burning is delivered to through conveyer to light rubbish in the screening installation oversize, and the humus soil in screening installation minus sieve delivers to through conveyer that humus soil predrying device is dried with the hot desorption apparatus of humus soil and the thermal desorption is handled, and see a mouthful downside off at the shale shaker oversize and be provided with one to throw the selection quick -witted, the utility model discloses a throwing selects quick -witted step to improve the collectionefficiency of plastics, through " waste control by waste " and heat energy cyclic utilization's theory, regard the heat energy of plastics burning release as the heat source of humus soil thermal desorption, vent gas treatment system in through the cement kiln deals with with the waste gas behind the humus soil thermal desorption, has practiced thrift the treatment cost of humus soil thermal desorption tail gas.