A method for selecting a Physical Random Access Channel Resource, PRACH resource in a Long Term Evolution, LTE system, comprising: receiving, by a terminal through a physical layer, a physical downlink control channel signaling sent by the LTE system (S301); characterized in that determining, by the terminal through a medium access control, MAC, layer, from among a plurality of subframes subsequent to a subframe of a radio frame in which the physical downlink control channel signaling is received, a first subframe set and a second subframe set and a first subframe of intersections of the first subframe set and the second subframe set, wherein the first subframe set comprise: subframe n of radio frame N and subframes subsequent to subframe n of radio frame N , and each subframe of the first subframe set differs from the subframe of the radio frame in which the physical downlink control channel signaling is received by greater than or equal to k , wherein N = ( M +└( m + k )/10┘)%1024, n = ( m + k )%10, M is the radio frame in which the physical downlink control channel signaling is received, m is the subframe in which the physical downlink control channel signaling is received, N is greater than or equal to M, and k is a processing time delay of the terminal on the physical layer after receiving the physical downlink control channel signaling; wherein the second subframe set comprises subframes containing the PRACH resource; selecting, by the terminal through the MAC layer, starting from said determined first subframe, a subframe containing the PRACH resource (S303); and sending, by the terminal through the physical layer, a physical random access preamble on the selected subframe containing the PRACH resource. receiving, by a terminal through a physical layer, a physical downlink control channel signaling sent by the LTE system (S301); characterized in that determining, by the terminal through a medium access control, MAC, layer, from among a plurality of subframes subsequent to a subframe of a radio frame in which the physical downlink control channel signaling is received, a first subframe set and a second subframe set and a first subframe of intersections of the first subframe set and the second subframe set, wherein the first subframe set comprise: subframe n of radio frame N and subframes subsequent to subframe n of radio frame N , and each subframe of the first subframe set differs from the subframe of the radio frame in which the physical downlink control channel signaling is received by greater than or equal to k , wherein N = ( M +└( m + k )/10┘)%1024, n = ( m + k )%10, M is the radio frame in which the physical downlink control channel signaling is received, m is the subframe in which the physical downlink control channel signaling is received, N is greater than or equal to M, and k is a processing time delay of the terminal on the physical layer after receiving the physical downlink control channel signaling; wherein the second subframe set comprises subframes containing the PRACH resource; selecting, by the terminal through the MAC layer, starting from said determined first subframe, a subframe containing the PRACH resource (S303); and sending, by the terminal through the physical layer, a physical random access preamble on the selected subframe containing the PRACH resource. <EOS>