The invention relates to the technical field of mobile communication, in particular to a network resource allocation method and a network resource allocation device, which are used for solving the problem of network resource conflict between a physical network element and a virtual network element. The network resource allocation method provided by the embodiment of the invention comprises the following steps: receiving network resource allocation requests sent by at least two network elements respectively, the at least two network elements comprising a physical network element and a virtual network element, and each network resource allocation request carrying a CPU load of a corresponding network element and a borne user capacity; Determining the fault degree of the network element basedon the CPU load of each network element and the borne user capacity; According to the embodiment of the invention, network resource allocation is carried out on the at least two network elements according to the fault degree of each network element, so that limited network resources can be reasonably allocated to the virtual network element or the physical network element according to the fault degree of each network element, and the problem of network resource conflict between the physical network element and the virtual network element is well solved.