Quantum key distribution is a secure system that uses an encryption protocol using quantum mechanics to solve the problem of distributing keys between the sender and the receiver, and it is the most widely used in the field of quantum computing(QC). Various protocols are designed to ensure the security and integrity of information from any attempt by an eavesdropper who monitors the transmitted photons. Performance analysis is important in determining. The possibility of various QKD protocols when using effective simulations to analyze and evaluate the results. Therefore, in this paper Quantum entanglement Opti System is used which is commercial optical simulation application that widely used in telecommunications in modeling and simulating. This application also used to simulate the experimental components in the distribution of quantum keys. The results obtained in this paper show using quantum entanglement technology are optimize when get the sifted key and QBER across when using a pair of entangled photons. Simulations can help researchers to test their models before conducting actual experiments.