An auxiliary rope knotter includes an interior formed with a first through hole, a second through hole, a first locking groove and a second locking groove which are parallel with each other. In the cross-sectional face of the auxiliary rope knotter, the first center connecting line formed by the first through hole and the second through hole intersects the second center connecting line formed by the first locking groove and the second locking groove, such that the rope is easily knotted by the auxiliary rope knotter.