A three-layer rapid composting device and a composting method by the device relate to a composting device and a composting method by the device. The invention aims to solve problems of long composting period,
odor pollution and low
fermentation efficiency that exist in an existing membrane-covered composting method. The device of the invention comprises a trapezoid
cement base, a draught fan, a perforated feed
pipe, a V-shaped percolate guiding chute, a waterproof and breathable membrane, a percolate draft tube and a percolate collecting box. the method of the invention comprises the following steps: 1, burden distribution: a
fermentation material and a
compost clinker are mixed and the mixture is placed at the bottom of the three-layer rapid composting device, the
compost clinker is covered, and a waterproof and breathable membrane is covered; 2,
fermentation for 7-20 days. According to the invention, the
compost clinker and the fermentation material are mixed without adding a conditioner. Thus, purchase expense of a conditioner is reduced, composting period is shortened, and
energy consumption is decreased. By changing ventilation direction, no energy is additionally added. In addition, fermentation efficiency is enhanced, and composting period can be remarkably shortened.