Special gum biogas generating pit

The utility model is a special type gum biogas digester, which relates to a biogas production device. The utility model comprises a fermentor of special type gum, a holding pit, a gas storage packet and a sunshine shed which is arranged on the top of the holding pit. One side of the holding pit is provided with an overflow pressure water tank, one side of which is provided with a liquid pumping device. The key technology of the utility model lies in that: the special type gum fermentor is arranged in the holding pit and one side of the special type gum fermentor is provided with more than one feeding pipe and the other side is provided with a residue pumping device which is communicated with the overflow pressure water tank at the bottom via the pipes. The top is provided with an air outlet which is connected with the air storage packet and the burning apparatus via pipelines. The utility model has the advantages that: the influence of the external temperature to the digester body is small; the gas production