The present disclosure provides a resource allocation method of a heterogeneous network under intermediate processing constraints. The method includes: generating a preference list for each intermediate node; obtaining network topology information of the heterogeneous network, and calculating a transmission path length of the data stream passing through the intermediate node according to the network topology information; obtaining a quasi-service list of each intermediate node; obtaining a mapping relationship between the intermediate nodes and the data flows according to the quasi-service list of each intermediate node, and sequentially scheduling the data flows according to the mapping relationship and the preference list of each intermediate node. A device for resource allocation of a heterogeneous network under intermediate processing constraints and a non-transitory computer storage medium are also disclosed.