The invention relates to a branching device for a multi-folded yarn. The branching device comprises a branching plate, a fixed plate, positive phase holes, a branching cone and negative phase holes, wherein the branching cone comprises a branching table, grooves and a rotary head; the fixed plate comprises hook tooth layers and a middle layer; the branching cone is arranged at the middle position of a long-side bisector of the branching plate; two positive phase holes are formed in the left side and the right side of the branching cone; two negative phase holes are formed in two sides of the long-side bisector of the fixed plate; a rotary head is arranged at the top end of the branching table; two grooves are formed in the left side and the right side of the branching table; and the hook tooth layers are arranged on the upper surface and the lower surface of the fixed plate; and the middle layer is arranged between the two hook tooth layers.