Device to Device(D2D) communications are proposed into cellular network in order to ease the shortage of spectrum resources, and improve the quality of local services. Proximity users in a cellular network can communicate directly with each other by D2D communication mode without necessarily going through the base station. The heterogeneous network structure is set up with D2D underlying cellular network，and through which the factors that relates with interference between D2D and the reused Cellular Use(CU) are analyzed. A joint transmission strategy based on Channel State Information(CSI) and Queue State Information(QSI) is adopted for the purpose of controlling Signal to Interference plus Noise Ratio(SINR) and transmission delay in order to guarantee the communication quality of both CU and D2D. As with the scenario of multiple CU and multiple D2D pairs, priority matrix based allocation algorithm is proposed to form optimal CU-D2D reuse combination，which has lower computational complexity and can achieve stable results that approximate to the most optimal solution when compared with binary matching algorithm.