A spun yarn winding system comprising: take-up units each of which includes a take-up member configured to take up yarns spun out from a spinning apparatus and a winding unit provided below the take-up member to wind the yarns taken up by the take-up member onto bobbins lined up in a horizontal first direction so as to form packages, the take-up units being lined up in a second direction which is horizontal and is orthogonal to the first direction; a yarn threading robot which is commonly provided for the take-up units, is provided on one side in the first direction of the winding unit, and is configured to thread the yarns onto the take-up members of the take-up units; and a controller configured to control the yarn threading robot, wherein the yarn threading robot is movable in the second direction while hanging down from above, characterized in that the take-up member includes a godet roller (12, 13) on which the yarns spun out from the spinning apparatus are wound, the yarn threading robot is provided on one side in the first direction of the take-up units to thread the yarns onto the godet roller (12, 13), and when the yarn threading robot threads the yarns, the godet roller (12, 13) is provided at an end portion on the one side in the first direction of each of the take-up units, the winding unit includes distribution guides which are lined up in the first direction and are configured to distribute the yarns sent from the godet roller (12, 13) to the bobbins, the yarn threading robot threads the yarns onto the distribution guides, and when the yarn threading robot threads the yarns, the distribution guides are shifted to an end portion on the one side in the first direction of the take-up units. take-up units each of which includes a take-up member configured to take up yarns spun out from a spinning apparatus and a winding unit provided below the take-up member to wind the yarns taken up by the take-up member onto bobbins lined up in a horizontal first direction so as to form packages, the take-up units being lined up in a second direction which is horizontal and is orthogonal to the first direction; a yarn threading robot which is commonly provided for the take-up units, is provided on one side in the first direction of the winding unit, and is configured to thread the yarns onto the take-up members of the take-up units; and a controller configured to control the yarn threading robot, wherein the yarn threading robot is movable in the second direction while hanging down from above, characterized in that the take-up member includes a godet roller (12, 13) on which the yarns spun out from the spinning apparatus are wound, the yarn threading robot is provided on one side in the first direction of the take-up units to thread the yarns onto the godet roller (12, 13), and when the yarn threading robot threads the yarns, the godet roller (12, 13) is provided at an end portion on the one side in the first direction of each of the take-up units, the winding unit includes distribution guides which are lined up in the first direction and are configured to distribute the yarns sent from the godet roller (12, 13) to the bobbins, the yarn threading robot threads the yarns onto the distribution guides, and when the yarn threading robot threads the yarns, the distribution guides are shifted to an end portion on the one side in the first direction of the take-up units.