The invention relates to a high-count siro spinning spandex yarn bundling method and production devices thereof. The method includes the steps of combining and twisting fiber into yarn on the three bundling devices in a yarn bundling area, adjusting the distances between the three bundling devices through a horizontally-moving mechanism, making four fiber bundles sequentially penetrate through the three bundling devices to form a fiber bundle, and finally twisting the fiber bundle into the yarn. By adjusting the distances between the three bundling devices, the fiber loss is reduced.