Quantum communication network transmission method based on entanglement purification

The invention discloses a quantum communication network transmission method based on entanglement purification, and the method comprises the following steps: 1, enabling a server to decompose the target fidelity of an end-to-end entanglement path to a link contained in the path, and enabling the decomposed target fidelity to serve as the target fidelity; 2, calculating the quantity of quantum bit resources required to be reserved for multi-round entanglement purification for reaching the target fidelity of the link for each link, 3, executing multi-round entanglement purification by each link by using the reserved quantity of quantum bit resources to obtain quantum bits conforming to the target fidelity of the link, and 4, executing entanglement swapping by using the quantum bits conforming to the link target fidelity along the path so as to obtain an entanglement path conforming to the end-to-end target fidelity. According to the method, limited quantum bit resources of the nodes are utilized, multiple round