The invention relates to a B+ tree management method based on remote direct nonvolatile memory access. According to the method, internal nodes of a complete B+ tree are stored on a DRAM, volatile leaf nodes on the DRAM only contain keywords, data corresponding to the keywords is stored in leaf nodes on a nonvolatile memory, and each volatile leaf node is associated with one nonvolatile leaf node; a client acquires a remote lock through RDMA atomic operation and then sends an operation command of the B+ tree to a server; the server reserves remote operation space in the corresponding nonvolatile leaf nodes; and the client uses an RDMA remote writing technology to directly persist the data into the nonvolatile leaf nodes of the server in a log form. Through the method, the client cooperates with the server in operation on the B+ tree of the nonvolatile memory, so that processing burden on the server is lowered under the condition of concurrent access; and besides, operation is performed on the nonvolatile leaf nodes in the log form, so that writing wear of the NVM is relieved.