The present invention relates to a movable laminating machine (30) and a plastic flooring laminating device using same. A laminating mechanism (32), a driving mechanism (33) and a conveying mechanism (34) assembled on a rack (31) compose the laminating machine (30) which can make continuous reciprocating movements. The movable laminating machine (30) is then disposed in an automatic production line for plastic flooring to cooperate with an extruder (10), a rolling unit (20) and a drawing mechanism (40) to laminate a plastic flooring material composed of a substrate layer (61), a printed layer (62) and a wear-resisting layer (63) into a finished plastic flooring product in an automatic operation manner. Because the time of the lamination of the material by the movable laminating machine can match the speed at which the material is conveyed and moved, the laminating mechanism is driven by the second power source to move from the front section position to the rear section position on the rack, and, after lamination is complete, is driven again by the second power source to move to the front section position for next laminating operation, and thereby the automatic continuous production operation of reciprocating lamination is accomplished.