The utility model discloses a methane -generating pit for municipal administration convenient to exhaust, including carrying pond, pan feeding mouth, gear and solar panel greatly, sheng zaichi's internal surface is provided with the protective layer, sheng zaichi's inboard is provided with exhaust flap, the pan feeding mouth is located the right side of carrying the pond greatly, the gear is located the upper end of carrying the pond greatly, and the well side -mounting of gear has a motor, the lower extreme of gear is connected with the stirring rod, the left and right sides of protection shield all is provided with the basin, solar panel is located the upside of protection shield, and solar panel's both sides all are connected with the fixture block, the inboard of fixture block is provided with the slide rail, and the downside of fixture block is provided with the telescopic link. This methane -generating pit for municipal administration convenient to exhaust has solved biogas outlet and has blockked up easily, and inconvenient exhaust problem has been solved the material in the methane -generating pit and has been depositd easily, is difficult to the fermentation, is difficultto produce the problem that a large amount of marsh gas supplied people to use to and the problem of leaking has easily been solved in the methane -generating pit.