Disclosed is a content encoding pre-synchronization method, comprising: a network device selecting a popular index with a high frequency of appearance from all indexes stored by the network device; determining, among base stations under management, another base station that is of the same type as a base station receiving the popular index, and when the link is idle, sending the popular index and data corresponding to the popular index to the base station. In the content encoding pre-synchronization method provided by an embodiment of the present invention, a popular index and a base station to which the index may be sent can be predetermined, and when the link is idle, the popular index is sent to the corresponding base station in advance, thereby reducing the sending delay in busy time, improving the compression ratio in busy time, and avoiding a loss of synchronization data caused by a busy link.