The invention discloses a multi-user resource allocation method based on base station selection under fog architecture. The multi-user resource allocation method comprises the following steps: S1, calculating the total harvesting energy of an energy receiver; S2, constructing an optimization objective, and establishing an objective function by taking maximum total harvesting energy of the energy receivers and ensuring the service quality and minimum throughput requirements of each information receiver as objectives; S3, loosening the objective function through a positive semi-definite loosening method; and S4, solving the objective function by adopting a heuristic optimization algorithm. Harvesting energy of the energy receiver is maximized, and the throughput of the information receiver is met. An optimization problem is required to be established. The RRH in the system is divided into the energy RRH and the information RRH, the energy receiver can obtain energy from the information signal and can also obtain energy from the special energy signal, and therefore the energy efficiency of the system is improved, the capacity load of a forward transmission link can be relieved, the transmission time delay can be reduced, and the network energy receiving gain can be increased.