A method for suppressing noise interference, comprising: connecting various attenuators to various uplinks of a terminal, characterized in that the method further comprises: connecting a Data Over Cable Service Interface Specifications, DOCSIS, service processing module to the attenuators; connecting the various attenuators to a directional coupler, mixing, by the directional coupler, low-frequency data signals, which are returned by a user and obtained by filtering through a low-pass filter, into an upstream data signal, US, and sending the US to the DOCSIS service processing module; configuring, by the DOCSIS service processing module, attenuation values of the attenuators, and sequentially determining whether noise interference exists in each of the various uplinks; and after the DOCSIS service processing module determines an uplink in which the noise interference exists, turning off the uplink, wherein sequentially determining whether noise interference exists in each of the various uplinks comprises: sequentially setting the attenuation value of the attenuator of each of the various uplinks to a maximum, wherein setting the attenuation value of an uplink to a maximum indicates that the uplink is turned off to check whether noise interference is eliminated; when the noise interference still exists, indicating that the noise interference is not introduced from the uplink; and when the noise interference disappears, indicating that the noise interference is introduced from the uplink. connecting various attenuators to various uplinks of a terminal, characterized in that the method further comprises: connecting a Data Over Cable Service Interface Specifications, DOCSIS, service processing module to the attenuators; connecting the various attenuators to a directional coupler, mixing, by the directional coupler, low-frequency data signals, which are returned by a user and obtained by filtering through a low-pass filter, into an upstream data signal, US, and sending the US to the DOCSIS service processing module; configuring, by the DOCSIS service processing module, attenuation values of the attenuators, and sequentially determining whether noise interference exists in each of the various uplinks; and after the DOCSIS service processing module determines an uplink in which the noise interference exists, turning off the uplink, wherein sequentially determining whether noise interference exists in each of the various uplinks comprises: sequentially setting the attenuation value of the attenuator of each of the various uplinks to a maximum, wherein setting the attenuation value of an uplink to a maximum indicates that the uplink is turned off to check whether noise interference is eliminated; when the noise interference still exists, indicating that the noise interference is not introduced from the uplink; and when the noise interference disappears, indicating that the noise interference is introduced from the uplink. connecting a Data Over Cable Service Interface Specifications, DOCSIS, service processing module to the attenuators; connecting the various attenuators to a directional coupler, mixing, by the directional coupler, low-frequency data signals, which are returned by a user and obtained by filtering through a low-pass filter, into an upstream data signal, US, and sending the US to the DOCSIS service processing module; configuring, by the DOCSIS service processing module, attenuation values of the attenuators, and sequentially determining whether noise interference exists in each of the various uplinks; and after the DOCSIS service processing module determines an uplink in which the noise interference exists, turning off the uplink, wherein sequentially determining whether noise interference exists in each of the various uplinks comprises: sequentially setting the attenuation value of the attenuator of each of the various uplinks to a maximum, wherein setting the attenuation value of an uplink to a maximum indicates that the uplink is turned off to check whether noise interference is eliminated; when the noise interference still exists, indicating that the noise interference is not introduced from the uplink; and when the noise interference disappears, indicating that the noise interference is introduced from the uplink. sequentially setting the attenuation value of the attenuator of each of the various uplinks to a maximum, wherein setting the attenuation value of an uplink to a maximum indicates that the uplink is turned off to check whether noise interference is eliminated; when the noise interference still exists, indicating that the noise interference is not introduced from the uplink; and when the noise interference disappears, indicating that the noise interference is introduced from the uplink.