The base station for indoor coverage on common processing platform (mini CRAN) is a LTE base station of miniaturization,lowpower,high capacity based on general processor. Because of the time synchronizationthat TDLTE system need，so this paper presents a IEEE1588 time synchronization programme in mini CRAN.In Base band Unit pool the masterslave synchronization model is used to achieve time synchronization and transmit 1588 time synchronization packets to the subordinate,the transmission time delay of 1588 packets in switch can be calculated with transparent clock model.By using the 1588 time analyzer test the time delay，the time delay can be in positive and negative 200 ns，and it reachs the TDLTE base station system requirements.