A method for configuring a reference signal sequence, comprising: selecting, by a base station, an ID used for generating a reference signal initialization sequence for a terminal from candidate identifiers, IDs, wherein the candidate IDs comprise a cell ID and more than one IDs with constant values, the IDs with constant values are determined by the base station and are sent to the terminal through higher-layer signaling; and generating, by the base station, a reference signal initialization sequence for the terminal according to the selected ID, wherein a formula for generating the reference signal initialization sequence is: c init = ⌊ n s / 2 ⌋ + 1 ⋅ 2 N ID + 1 ⋅ 2 16 + n SCID wherein n s is a time slot number, n SCID is a scrambling ID, N ID is the selected ID; wherein the method further comprises: sending, by the base station, a reference signal initialization sequence generation indication to the terminal according to the selected ID, in order for the terminal to generate a reference-signal initialization sequence according to the indication; wherein the method is processed in a long term evolution advanced, LTE-A, system, or in a long term evolution, LTE, system, and the reference signal initialization sequence generation indication comprises: demodulation reference signal, DMRS, port signaling in downlink scheduling signaling, and before the base station sends the DMRS port signaling, the method further comprises: determining, by the base station, the DMRS port signaling to be sent to the terminal, according to the selected ID for the terminal, a DMRS port configuration table and a relationship between scrambling IDs and candidate IDs, wherein the DMRS port configuration table configures correspondence between the scrambling IDs and DMRS port signaling. selecting, by a base station, an ID used for generating a reference signal initialization sequence for a terminal from candidate identifiers, IDs, wherein the candidate IDs comprise a cell ID and more than one IDs with constant values, the IDs with constant values are determined by the base station and are sent to the terminal through higher-layer signaling; and generating, by the base station, a reference signal initialization sequence for the terminal according to the selected ID, wherein a formula for generating the reference signal initialization sequence is: c init = ⌊ n s / 2 ⌋ + 1 ⋅ 2 N ID + 1 ⋅ 2 16 + n SCID wherein n s is a time slot number, n SCID is a scrambling ID, N ID is the selected ID; sending, by the base station, a reference signal initialization sequence generation indication to the terminal according to the selected ID, in order for the terminal to generate a reference-signal initialization sequence according to the indication; wherein the method is processed in a long term evolution advanced, LTE-A, system, or in a long term evolution, LTE, system, and the reference signal initialization sequence generation indication comprises: demodulation reference signal, DMRS, port signaling in downlink scheduling signaling, and before the base station sends the DMRS port signaling, the method further comprises: determining, by the base station, the DMRS port signaling to be sent to the terminal, according to the selected ID for the terminal, a DMRS port configuration table and a relationship between scrambling IDs and candidate IDs, wherein the DMRS port configuration table configures correspondence between the scrambling IDs and DMRS port signaling.