A cable management assembly,comprising: a cable management device comprising a first arm, a second arm and an intermediate frame pivoted between the first arm and the second arm, the intermediate frame comprising an upper frame and a lower frame, the upper frame and the lower frame respectively having a first mounting feature; and a supporting device configured to support at least one of the first arm, the second arm and the intermediate frame, the supporting device comprising a base and an elastic member, wherein the elastic member is arranged on the base, the elastic member has a second mounting feature, and the second mounting feature is configured to be detachably mounted on said first mounting feature; wherein the second mounting feature of the elastic member comprises a guiding portion, when the supporting device is moved along a mounting direction relative to the cable management device, the second mounting feature of the supporting device and the first mounting feature of the cable management device is capable of being guided to be mounted through the guiding portion; wherein one of the cable management device and the supporting device comprises a blocking feature, the base has a front end and a rear end opposite to the front end, the second mounting feature is located between the blocking feature and the front end of the base, the blocking feature is located between the second mounting feature and the rear end of the base, when the supporting device is mounted to the cable management device by orienting the rear end of the base as a mounting interface along the mounting direction, the supporting device and the cable management device are blocked by each other through the blocking feature, in order to prevent the second mounting feature of the supporting device and the first mounting feature of the cable management device from being mounted. a cable management device comprising a first arm, a second arm and an intermediate frame pivoted between the first arm and the second arm, the intermediate frame comprising an upper frame and a lower frame, the upper frame and the lower frame respectively having a first mounting feature; and a supporting device configured to support at least one of the first arm, the second arm and the intermediate frame, the supporting device comprising a base and an elastic member, wherein the elastic member is arranged on the base, the elastic member has a second mounting feature, and the second mounting feature is configured to be detachably mounted on said first mounting feature; wherein the second mounting feature of the elastic member comprises a guiding portion, when the supporting device is moved along a mounting direction relative to the cable management device, the second mounting feature of the supporting device and the first mounting feature of the cable management device is capable of being guided to be mounted through the guiding portion; wherein one of the cable management device and the supporting device comprises a blocking feature, the base has a front end and a rear end opposite to the front end, the second mounting feature is located between the blocking feature and the front end of the base, the blocking feature is located between the second mounting feature and the rear end of the base, when the supporting device is mounted to the cable management device by orienting the rear end of the base as a mounting interface along the mounting direction, the supporting device and the cable management device are blocked by each other through the blocking feature, in order to prevent the second mounting feature of the supporting device and the first mounting feature of the cable management device from being mounted.