In this paper, we introduce an OOP-based D2D communication simulator of L TE network. This simulator realizes system level simulation of LTE-D2D network. It's 297 SuB 2.3 convenient for us to design some radio resource allocation algorithms and evaluate the performance of network on this simulation platform. According to the simulation results, we realize the initialization of LTE-D2D network and evaluate the performance of cellular users and D2D user