A random access method applied to a terminal, comprising: receiving random access resource selection criterion information and random access resource information broadcasted by a network side device; receiving, from the network side device, information on a pairing of a high frequency downlink frequency range and a low frequency uplink frequency range supported by the network side device through the random access resource selection criterion information, wherein, the pairing of the high frequency downlink frequency range and the low frequency uplink frequency range is determined according to working band capability supported by the network side device; determining, from the random access resource information, target random access resource information corresponding to the random access resource selection criterion information; and initiating a random access request to the network side device according to the target random access resource information, wherein, the random access resource information comprises a carrier frequency identification within at least one uplink frequency range supported by the network side device or a center frequency of an uplink carrier within the at least one uplink frequency range; the random access resource selection criterion information comprises a random access resource selection criteria threshold corresponding to the terminal over the at least one uplink frequency range, respectively over at least one uplink carrier, wherein, the random access resource selection criteria threshold represents a coverage boundary of the at least one uplink frequency range, respectively a coverage boundary of the at least one uplink carrier. receiving random access resource selection criterion information and random access resource information broadcasted by a network side device; receiving, from the network side device, information on a pairing of a high frequency downlink frequency range and a low frequency uplink frequency range supported by the network side device through the random access resource selection criterion information, wherein, the pairing of the high frequency downlink frequency range and the low frequency uplink frequency range is determined according to working band capability supported by the network side device; determining, from the random access resource information, target random access resource information corresponding to the random access resource selection criterion information; and initiating a random access request to the network side device according to the target random access resource information, wherein, the random access resource information comprises a carrier frequency identification within at least one uplink frequency range supported by the network side device or a center frequency of an uplink carrier within the at least one uplink frequency range; the random access resource selection criterion information comprises a random access resource selection criteria threshold corresponding to the terminal over the at least one uplink frequency range, respectively over at least one uplink carrier, wherein, the random access resource selection criteria threshold represents a coverage boundary of the at least one uplink frequency range, respectively a coverage boundary of the at least one uplink carrier.