Preparation method of spray-seeding seeds for ecological slope protection engineering

The invention discloses a preparation method of spray-seeding seeds for ecological slope protection engineering. According to diversified plant combinations, various plants such as gramineous plants, leguminous plants, shrub plants, arbor plants and flower plants are included in the seed proportion, and the combinations can provide different ecological functions such as nitrogen fixation, soil structure improvement and soil fertility improvement, so that the stability and health of the whole ecological system are promoted. The selected plant species have high stress resistance and can adapt to the special environment of the side slope, leguminous plants such as alfalfa and sweet clover have nitrogen fixation capacity and can grow under the severe soil condition, and shrub plants such as lespedeza, caragana microphylla and the like have high drought resistance and wind erosion resistance. Gramineae plants such as perennial ryegrass and festuca arundinacea can quickly cover the surface of the slope, water and s