Biological soil for mine vegetation recovery and preparation method thereof

The invention discloses biological soil for mine vegetation recovery and a preparation method thereof, and belongs to the technical field of mining industry environmental protection engineering, the biological soil comprises the following components by weight: 40-50 parts of starch plastic, 10-15 parts of dried sludge, 10-15 parts of fermented sludge, 5-10 parts of straw, 10-15 parts of humus, 5-8 parts of dead leaf powder, 4-8 parts of sawdust, 5-10 parts of a water-retaining agent, 10-15 parts of a conditioning agent, 2-5 parts of a biological flocculant, and 1-3 parts of a chelating agent. According to the biological soil for recovery, starch plastic is arranged as a base material and serves as a basic component, the actual soil condition of a mine surface layer is considered, vegetation coverage is lacked, and consequently surface layer soil is prone to being eroded by rainwater and wind power, and the soil can be regionally separated by means of the sandwich net and the consolidation frame which are made