A method and device for processing a wireless baseband capable of expanding dynamically are provided. The method includes the following steps: a plurality of groups of wireless baseband processing clusters which have different processing capacities and are relatively independent are pre-constructed (S201); a current load working state of each group of wireless baseband processing clusters is acquired by monitoring the processing loads of the plurality of groups of wireless baseband processing clusters (S202); and according to baseband processing task requirements and the current load working state of each group of wireless baseband processing clusters, a certain number of wireless baseband processing clusters of which the current load working states are suitable for performing a baseband processing task are scheduled to enter a working state for performing the wireless baseband processing task (S203).