A random access method for user equipment in time division synchronization code division multiple access communication system, includes: (a) system broadcasts configured ASC and configuration information thereof to UE, the UE records these information; (b) the MAC of the UE transmits RACH transmitting request to the physical layer, the physical layer selects a RACH; (c) the UE physical layer selects randomly an uplink synchronization code and an uplink synchronization sub-channel; (d) after the UE physical layer has transmitted the selected uplink synchronization code on the uplink pilot slot correspnding to the selected uplink synchronization sub-channel, if the UE receives the access confirm information from network side, then completes the uplink synchronization, and selects PRACH to transmits message, if not, reimplements network side access. Using the invention, at the rondam access procedure, the UE of TD-SCDMA system makes the physical on UE side select a system as the ASC configuration resource, and reaches the QoS requirement and avoids the generation of conflict.