Disposable excrement bag based on agricultural and forestry wastes

The top of a feces bag body is open, the bottom of the feces bag body is closed, an annular channel is fixedly formed in the top of the feces bag body along the edge of the opening, a tightening pull rope is arranged in the annular channel in a penetrating mode, the two ends of the tightening pull rope are fixedly connected end to end, and a notch is formed in the annular channel. The tightening pull rope is communicated with the outside through the notch; a filling area is arranged in the center of the bottom of the inner side of the excrement bag body and comprises an anti-leakage net layer, an agricultural and forestry waste filling layer and a composite paper layer which are sequentially and fixedly arranged from top to bottom, and the remaining area is made of composite paper. According to the excrement bag, excrement is packaged, and the problems that a traditional pit latrine is large in smell and poor in environment are solved; the rice husks, the straws and the saw dust are used for filling, so that