NOVELTY - Marsh gas generator comprises an egg-shaped structure which is along the middle part form upper cover (4) and shell (1). The upper cover is provided with a through hole, which is inserted into gas collecting pipeline (5), and further includes inner shell (2). The inner shell is fixed within the housing through the bracket, where the inner shell from a gap (11) to form a heating cavity (6). The inner cavity is mounted for a heating element (12). The gas generator further comprises a garbage basin (3).    USE - In construction of buildings.    ADVANTAGE - The biogas generator is designed in an egg-shape; is not only facilitates the fermentation, but also evenly distributes heat to improve the fermentation efficiency; is more aesthetically pleasing compared to the prior fermentation tank.    DETAILED DESCRIPTION - Marsh gas generator comprises an egg-shaped structure which is along the middle part form upper cover (4) and shell (1). The upper cover is provided with a through hole, which is inserted into gas collecting pipeline (5), and further includes inner shell (2). The inner shell is fixed within the housing through the bracket, where the inner shell from a gap (11) to form a heating cavity (6). The inner cavity is mounted for a heating element (12). The top edge height of the inner shell is less than the height of top edge height of the housing. The gas generator further comprises a garbage basin (3). The upper edge of garbage basin is horizontally extended to form card and lug boss (31). The bottom of the garbage basin is set with stir paddle. The bottom of the basin body is provided with a rotary electric machine (7). The bottom of the stir paddle is fixed to rotary electric machine through the garbage basin. The inner shell is provided with rotary electric machine for fixing card and hole. The rotary electric machine is fixed on inner shell through a platform (13).    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a marsh gas generator.    Shell (1)    Inner shell (2)    Garbage basin (3)    Upper cover (4)    Gas collecting pipeline (5)    Heating cavity (6)    Rotary electric machine (7)    Gap (11)    Heating element (12)    Platform (13)    Pug boss (31)