The present disclosure provides a resource allocation method and system on a Software Defined Protocol (SDP) network. The method includes: receiving, by a resource allocator, a resource request message sent by a protocol stack deployment node, where the resource request message carries information about a protocol stack deployed on the protocol stack deployment node; determining, by the resource allocator, information about an available resource on an SDP network, where the available resource is used for resource allocation of the protocol stack; determining, by the resource allocator according to the information about the protocol stack and the information about the available resource, a resource allocated to each protocol layer in the protocol stack; and sending, by the resource allocator, a resource feedback message to the protocol stack deployment node, where the resource feedback message carries the information about the resource allocated to each protocol layer.