A floorboard includes a floorboard main body and a plastic edge frame. The plastic edge frame is configured to wrap the periphery of the floorboard main body. The back of the plastic edge frame is provided with a guide rail. The guide rail is provided with plastic slide blocks. The plastic slide blocks are matched with the guide rail of the plastic edge frame of another corresponding adjacent floorboard. A length defined between two adjacent plastic slide blocks on the same guide rail is greater than the length of each plastic slide block. The floorboard main body includes a wear-resisting layer, a decoration layer, a particleboard layer, and a balanced layer which are arranged from up to bottom. A top surface of the plastic edge frame is hidden under the decoration layer.