High-calorific-value household garbage incineration water-cooling grate furnace

The invention discloses a high-calorific-value household garbage incineration water-cooling fire grate furnace which comprises a movable fire grate segment set, a fixed fire grate segment set and a motion compensation device. A plurality of fixed connecting pieces are arranged at the upper ends of the two fixed fire grate frames in the length direction of the fixed fire grate frames, the corresponding positions of the movable fire grate frames penetrate through the lower portions of the corresponding fixed connecting pieces respectively, and a plurality of movable connecting pieces are arranged at the upper ends of the movable fire grate frames in the length direction of the movable fire grate frames. The fixed connecting pieces and the movable connecting pieces are alternately distributed at intervals, fixed fire grate segment sets are arranged on the fixed connecting pieces, and movable fire grate segment sets are arranged on the movable connecting pieces; a movable water cooling pipeline is arranged betwee