Trowelling mechanism, trowelling method and trowelling machine

The invention provides a trowelling mechanism which comprises a first scraping face and a second scraping face, the first scraping face and the second scraping face are opposite in direction, and when the trowelling mechanism moves in the first direction, the first scraping face is used for scraping protruding materials on the ground and pushing the protruding materials to advance in the first direction; when the trowelling mechanism moves in the second direction, the second scraping face is used for pushing the ground protruding materials collected by the first scraping face to advance in the second direction, and the first direction is different from the second direction. The first driving assembly is used for driving the first scraping face and the second scraping face to get close to or away from the ground. Protruding materials on the ground can be scraped off through the first scraping face, meanwhile, materials scraped off and collected by the first scraping face can be subjected to low-lying area back