The invention discloses a laminate flooring trimming device which comprises a roller table and counter-pressing steel plates, wherein multiple rollers are arranged in parallel on a roller table rack; the counter-pressing steel plates are oppositely arranged on the two sides of the roller table in parallel; the space between the counter-pressing steel plate I and the counter-pressing steel plate II is greater than the floor width; the length of the counter-pressing steel plate I and the counter-pressing steel plate II is greater than the floor length; the counter-pressing steel plate I is fixedly mounted on one side of the roller table and is vertical to the rollers; the counter-pressing steel plate II is movably mounted on the other side of the roller table and is vertical to the rollers; the counter-pressing steel plate II can horizontally move toward the counter-pressing steel plate I in a direction vertical to the counter-pressing steel plate I; the space between the counter-pressing steel plate I and the counter-pressing steel plate II is greater than the floor width; the length of the counter-pressing steel plate I and the counter-pressing steel plate II is greater than the floor length; and an inductor is arranged close to the top of an exit formed by the counter-pressing steel plate I and the counter-pressing steel plate II. The problems such as complicated mechanical structure and high requirements on the material of scraping steel plates of existing scraping device are solved.