Disclosed is a data backup and recovery method applied to a mobile digital network. The method comprises the steps of communication initialization, communication service combination, communication service interruption and communication service recovery. According to the data backup and recovery method applied to the mobile digital network, on the condition that basic facilities and communication facilities are limited, all terminal nodes conduct cooperative work through supporting of the mobile terminal network, when the terminal nodes break down, local recovery is conducted firstly, then global recovery is conducted after faults exceed a certain range, therefore, the response time and the recovery time are shortened and the efficiency is increased.