On the basis of the GPRS TBCG module in one communication operator

the paper analyses bottleneck of this module.It caused system inefficient and inconsistency of the user order data between TBCG and BOSS or the other inner system.Based on current GPRS charge detail records processing procedure in the BOSS

it adds a new CDR processing module of GPRS time based charging.The user order data in BOSS is accessed through reading memory database in the new added module.It processes abnormal GPRS time based CDR（CDR with zero flow and non-zero duration） and time overlapping ones by distinguishing scenes to output correct ones.By comparing system performance

the data shows that the optimization module performance is much better than the old one in processing ability and efficiency.It assures the consistency of the user order data in each procedure.And it was contented with service development.