The embodiment of the invention relates to label distributing method and processing device. The label distributing method comprises the following steps of: receiving a first request data packet sent by an application module, wherein the request data packet carries pseudo label marks for marking different applications; acquiring label marks from a label marking memorizer, wherein the label marks are used for marking the first request data packet; setting and storing the corresponding relation of the label marks and the pseudo label marks according to the acquired label marks; replacing the pseudo label marks by adopting the acquired label marks; constructing a second request data packet carrying the label marks, and sending the second request data packet to a sending port. The label distributing method and processing device of the embodiment of the invention realizes the dynamic correspondence of label marks of different application modules, thereby distributing available label marks in time aiming to the request data packet sent by different application modules, improving the distributing efficiency and the utilization rate of the label marks and improving the utilization rate of bandwidth.