NOVELTY - A marsh gas tank for uninterruptedly producing gas all the year around comprises movable coping, water pressure chamber, gas-guide tube, feeding and discharging pipes and fermenting chamber; gas-guide tube is led out from neck of the fermenting chamber; ring is connected with outer wall of the feeding and discharging pipes by several ribs; stirrer is set at the bottom of the fermenting chamber; rotator is matched with the stirrer; and piston type slag pimping device extended from the feeding and discharging pipes is matched with the marsh gas tank.    USE - The marsh gas tank is used for uninterruptedly producing gas all the year around (claimed).    ADVANTAGE - The marsh gas tank is convenient for feeding and discharging with little floor area, fine gas collection effect, strong and stable firepower, and uninterruptedly produces gas all the year around.    DETAILED DESCRIPTION - A marsh gas tank for uninterruptedly producing gas all the year around comprises movable coping, water pressure chamber, gas-guide tube, feeding and discharging pipes and fermenting chamber; the gas-guide tube is led out from neck of the fermenting chamber; the movable coping is set above the water pressure chamber; the water pressure chamber is pressed above the fermenting chamber vertically; the centers of the movable coping, water pressure chamber, feeding and discharging pipes and fermenting chamber are on the same axial line; the feeding and discharging pipes are extended in the fermenting chamber; the outer edges of the feeding and discharging pipes are sealed with the fermenting chamber; the water pressure chamber is communicated with the fermenting chamber by the feeding and discharging pipes; a ring is connected with outer wall of the feeding and discharging pipes by several ribs; a stirrer is disposed at the bottom of the fermenting chamber; a rotator extended from the feeding and discharging pipes is matched with the stirrer; a piston type slag pimping device extended from the feeding and discharging pipes is matched with the marsh gas tank.    DESCRIPTION OF DRAWING(S) - The drawing shows the sectional view of the marsh gas tank for uninterruptedly producing gas all the year around.    Pin (9)