An alarm report method for cascaded equipments, characterized by comprising: determining, by a Radio Equipment, RE, a source of link alarm information after the RE receives the link alarm information; selecting, by the RE, one link alarm information report mode from multiple predetermined link alarm information report modes according to a result of determining the source; and reporting, by the RE, the link alarm information to a Radio Equipment control center, REC, according to the selected link alarm information report mode, wherein the multiple link alarm information report modes comprise: the link alarm information is reported to the REC through a data link layer transmission channel or data network layer transmission channel with a data checking function; or the link alarm information is reported to the REC through a physical layer channel between the RE and the REC; or the link alarm information is reported to the REC through a superior RE cascaded with the RE, wherein the process that the RE selects the link alarm information report mode comprises: selecting a link alarm information report mode in which the link alarm information is reported to the REC through a data link layer transmission channel or data network layer transmission channel with a data checking function in case that the source of the link alarm information is a master port of the RE or an inferior RE cascaded with the RE; or selecting a link alarm information report mode in which the link alarm information is reported to the REC through the superior RE cascaded with the RE or through the physical layer channel between the RE and the REC in case that the source of the link alarm information is a slave port of the RE, and wherein reporting the link alarm information to the REC through a superior RE cascaded with the RE comprises: sending, by the RE, the link alarm information to the master port of the superior RE cascaded with the RE; reporting, after receiving the link alarm information by the master port of the superior RE, the link alarm information to the REC through the data link layer transmission channel or data network layer transmission channel with a data checking function. determining, by a Radio Equipment, RE, a source of link alarm information after the RE receives the link alarm information; selecting, by the RE, one link alarm information report mode from multiple predetermined link alarm information report modes according to a result of determining the source; and reporting, by the RE, the link alarm information to a Radio Equipment control center, REC, according to the selected link alarm information report mode, the link alarm information is reported to the REC through a data link layer transmission channel or data network layer transmission channel with a data checking function; or the link alarm information is reported to the REC through a physical layer channel between the RE and the REC; or the link alarm information is reported to the REC through a superior RE cascaded with the RE, wherein the process that the RE selects the link alarm information report mode comprises: selecting a link alarm information report mode in which the link alarm information is reported to the REC through a data link layer transmission channel or data network layer transmission channel with a data checking function in case that the source of the link alarm information is a master port of the RE or an inferior RE cascaded with the RE; or selecting a link alarm information report mode in which the link alarm information is reported to the REC through the superior RE cascaded with the RE or through the physical layer channel between the RE and the REC in case that the source of the link alarm information is a slave port of the RE, and selecting a link alarm information report mode in which the link alarm information is reported to the REC through a data link layer transmission channel or data network layer transmission channel with a data checking function in case that the source of the link alarm information is a master port of the RE or an inferior RE cascaded with the RE; or selecting a link alarm information report mode in which the link alarm information is reported to the REC through the superior RE cascaded with the RE or through the physical layer channel between the RE and the REC in case that the source of the link alarm information is a slave port of the RE, and wherein reporting the link alarm information to the REC through a superior RE cascaded with the RE comprises: sending, by the RE, the link alarm information to the master port of the superior RE cascaded with the RE; reporting, after receiving the link alarm information by the master port of the superior RE, the link alarm information to the REC through the data link layer transmission channel or data network layer transmission channel with a data checking function. sending, by the RE, the link alarm information to the master port of the superior RE cascaded with the RE; reporting, after receiving the link alarm information by the master port of the superior RE, the link alarm information to the REC through the data link layer transmission channel or data network layer transmission channel with a data checking function.