Method for quickly growing bryophyte crust on cross section of expressway slope

The invention discloses a method for quickly growing a bryophyte crust on the cross section of an expressway slope. The method comprises the following steps: performing natural air drying on crust bryophytes together with very thin crust soil, and then smashing; uniformly spraying with water to wet fiber grid cells on an expressway slope, uniformly spreading the smashed soil-mixed bryophyte fragments on the cross section of a fiber grid, compacting the bryophytes with a flat tool, and covering with a plastic film; and pricking a certain number of pinholes in the film, and performing shading treatment on the film with a shading net to ensure that scattered light is received. According to the invention, the crust bryophytes are taken as basic materials, and the quick bryophyte propagation method is used for the cross section of an expressway, the cross section of mining area exploitation and other places where ecological environment of soil is destroyed, so that a bryophyte crust is formed on the surface of the