A TD-LTE network has been constructed by CMCC recently. The coverage of their network is high-level. But there are still some area which is lack of capacity. The user experience might be degrade by the phenomenon as access failure or slow netwoke speed caused by it. For holding the lead of 4G network

it is necessary to expand the capacity of network in this condition. This article will analyze the reasons and put forward some methods to expand the capacity. And a example is given to shown how to realize the capacity expansion.