The embodiment of the invention provides a yaw cable-untying control method and device for a wind generating set. The yaw cable-untying control method for the wind generating set comprises the steps that when the wind generating set shuts down due to failures, whether or not a target failure happens to the wind generating set is determined, wherein the target failure includes a self-reset failure/non-self-reset failure occurring when the self-reset time duration is greater than or equal to a preset time duration; and if the target failure happens to the wind generating set, cable-untying control is conducted. By adoption of the yaw cable-untying control method and device for the wind generating set, the influence of a too long cable-untying time required after cable twisting on the power generation capacity of the wind generating set can be reduced.