The utility model relates to a continuous pyrolysis treatment domestic waste fixed bed reactor of low temperature. The reactor includes the feed inlet, the reacting chamber, gas collection zone, the collection chamber, the discharge gate, the feed inlet is on the discharge gate, feed screw has in the reacting chamber, ejection of compact spiral, the flitch, the flitch includes feed end and discharge end, feed screw is under the feed inlet, feed end upper portion, ejection of compact spiral is on discharge end upper portion, and the discharge end is on the discharge gate, feed screw includes a center screw and a left side, right spiral blade, a left side, right spiral blade is crossed by center screw, both perpendicular to center screw's central line becomes the axial symmetry, the distance is 13~12 of feed inlet bore, gas collection zone is on the reacting chamber, and the collection chamber is on gas collection zone. The utility model discloses can realize domestic waste's continuous processing, easy and simple to handle, the heat utilization efficiency is high, and economic benefits is showing.