NOVELTY - A zero-emission ecological pig raising bed comprises a fermentation layer with thickness of 45-60 cm, a dehumidified air permeable layer with thickness of 25-35 cm and a grass roots as base layer from the top to bottom, where the fermentation layer comprises fermentation culture, edible mushroom waste residue and crop straw, the edible mushroom waste residue and crop straw residue are mixed with the fermentation culture after being fermented under a high temperature, the fermentation culture comprises 40-60 g fermentation strain per square meter.    USE - Zero-emission ecological pig raising bed.    ADVANTAGE - The pig raising bed is more sanitary, and has improved decomposition efficiency of the fermentation layer, better pig excrement decomposition effect, better effect of controlling pig house temperature and humidity, and improved whole sanitary environment of the pig house.    DETAILED DESCRIPTION - A zero-emission ecological pig raising bed comprises a fermentation layer with thickness of 45-60 cm, a dehumidified air permeable layer with thickness of 25-35 cm and a grass roots as base layer from the top to bottom, where the fermentation layer comprises fermentation culture, edible mushroom waste residue and crop straw, the edible mushroom waste residue and crop straw residue are mixed with the fermentation culture after being fermented under a high temperature, the fermentation culture comprises 40-60 g fermentation strain per square meter, the fermentation strain comprises Bacillus, yeasts, lactic acid fungus, Bacillus subtilis and ray fungus, the Bacillus, yeasts and lactic acid fungus is added with pig feed and excrement of pig and discharged to the fermentation layer, and the Bacillus subtilis and ray fungus are scattered directly on the fermentation layer, the edible mushroom waste residue comprises Pleurotus eryngii, needle mushroom and mushroom, the crop straw residue comprises corn straw and sugarcane straw, the dehumidified air permeable layer comprises high-temperature fermentation after cotton seed hulls, and is provided with outside air communicating aeration tube in the interior of the cotton sub-shell. An INDEPENDENT CLAIM is also included for a method for preparing a zero-emission ecological pig raising bed.