The invention relates to a high-
solid anaerobic reaction device and method for organic garbage. The device comprises a
pulverizer, a pretreatment pond and an anaerobic
fermentation tank, wherein the
pulverizer is arranged above the pretreatment pond; a spiral conveying device is arranged below the material outlet of the pretreatment pond and connected with the anaerobic
fermentation tank; a liquid-collecting
pipe is connected to the bottom of the anaerobic
fermentation tank and connected to a four-way
pipe fitting; the other three ports of the four-way
pipe fitting are connected with a water draining pipe, a pretreatment pond
backflow pipe and a
biogas slurry spraying return pipe respectively; the anaerobic fermentation tank is internally sequentially provided with a spraying perforated plate and a
sieve plate from top to bottom. According to the
anaerobic reaction device for the organic garbage with the high
solid content, the material pulverization, pretreatment and fermentation are integrated, the material uniformity is guaranteed, an anaerobic fermentation process is facilitated, the
solid concentration and uniformity of a material are regulated through fermentation liquor
backflow, and the stable fermentation of organic garbage is realized; the
anaerobic reaction device has the characteristics of wide adaptability, high treatment efficiency, compact
layout, stable operation, small
land occupation area and the like.