In this paper two Quantum Key Distribution(QKD)protocols are proposed,which combined BB84 protocoland EPR protocol subtly.In our protocols,entangled particles and non-orthogonal particles are mixed together and trans-mitted in the quantum channel.They play different roles respectively,and their physical characters are fully exploited.As a result,the efficiency of QKD is improved and identity authentication is added to the QKD procedure. In this paper two Quantum Key Distribution (QKD) protocols are proposed, which combined BB84 protocoland EPR protocol subtly. In our protocols, entangled particles and non-orthogonal particles are mixed together and trans-mitted in the quantum channel. The play roles respectively , and their physical characters are fully exploited. As a result, the efficiency of QKD is improved and identity authentication is added to the QKD procedure.