Full-film-mulching sowing and soil covering method and soil covering device of full-film-mulching sowing machine

The invention discloses a full-film-mulching sowing and soil covering method, which comprises the following steps of: sowing two ridges of crops on a mulching film, covering soil on the ridges on the mulching film and the edge of the film in a strip shape, and simultaneously covering film pressing soil piles in the middle of the mulching film between the two ridges on the mulching film one by one. The invention further designs a soil covering device of the full-film-mulching seeder, and is suitable for the method. The inner sides of the two soil sliding covers are respectively provided with an in-film soil sliding hole and an in-film soil sliding groove; a soil collecting hopper is respectively arranged below the two in-film soil sliding grooves; the rear side of each soil collecting hopper is provided with a soil leaking hole; a soil retaining door is hinged to the soil leaking hole; and the soil retaining door is connected with a soil leakage driving mechanism for driving the soil retaining door to be opene