The invention discloses multi-yarn combining equipment and a working method thereof. The multi-yarn combining equipment comprises a base, a yarn combining mechanism, a side plate, a drive mechanism, adustproof box, a first guide rod, a regulating mechanism and a second guide rod, wherein one end of the top of the base is fixedly equipped with the yarn combining mechanism. According to the multi-yarn combining equipment disclosed by the invention, a gas cylinder III is driven, and a piston rod drives a connecting block to descend, so that a lifting roller is driven to descend, and height of the lifting roller is regulated, and therefore, tensioning force, on yarns, of the lifting roller can be regulated; then, a gas cylinder II is driven, and a rocker arm pushes a movable block to move, sothat a spring pushes slide blocks II to horizontally slide; the two slide blocks II move oppositely or separately, so that a distance between the two movable rollers is regulated, and therefore, tensioning force, on the yarns, of the movable rollers can be regulated; and the multi-yarn combining equipment is suitable for different yarns, and can combine and roll different yarns.