1. A virtual machine migration management method comprising: calculating, according to migration parameters of a to-be-migrated virtual machine, migration duration time required for migrating the to-be-migrated virtual machine from a source computing node to a destination computing node, wherein the migration parameters comprise an allocated memory size, a memory change rate, and migration network bandwidth that are of the to-be-migrated virtual machine; separately acquiring current available migration duration time of the source computing node and current available migration duration time of the destination computing node; and if neither the current available migration duration time of the source computing node nor the current available migration duration time of the destination computing node is less than the migration duration time, determining to migrate the to-be-migrated virtual machine from the source computing node to the destination computing node.