Resource allocation method and device and storage medium

The invention provides a resource allocation method and device and a storage medium, and relates to the technical field of communication. The method is suitable for a space-ground integrated optical network, and comprises the following steps: acquiring service request information which comprises a service bandwidth demand, a service arrival time and a service duration of a service request; determining a service end moment according to the service arrival moment and the service duration; determining whether the network topology of the space-ground integrated optical network is fixed or not within a time period from the service arrival moment to the service end moment; if yes, resources are allocated to the service according to the service bandwidth requirement under the network topology of the service arrival moment; and if not, allocating resources to the service according to the intersection of the plurality of network topologies from the service arrival moment to the service end moment and the service bandw