A cable management device, the cable management device comprising: a shaft; a first component comprising a bottom part, a connection part and a wall part, each of the wall part and the connection part is bent relative to the bottom part and forms a predetermined angle in relation to said bottom part; and a second component comprising a first part and a second part bent relative to the first part, the second component configured to open or close the first component, the second component comprising a second engagement part protruding from the second part and two auxiliary parts protruding from the first part in a protrusion direction substantially identical to a bending direction of the second part, wherein the second component pivots on the connection part of the first component by the shaft; wherein when the second component closes the first component and the second component, a cable management space is defined by the first component and the second component, and the wall of the first component is engaged between the second engagement part and the two auxiliary parts of the second component; wherein the wall part of the first component has a first side and a second side, the first side is formed with a first engagement part; wherein when the second component closes the first component, the second engagement part is engaged with the first engagement part of the first component, and the two auxiliary parts are located adjacent to the second side of the wall of the first component, a first distance is defined between an auxiliary part and the second side of the wall of the first component, a second distance is defined between the first engagement part and the second engagement part, the first distance is smaller than the second distance; wherein a space is formed between the two auxiliary parts to accommodate a protruded part of the wall part. a shaft; a first component comprising a bottom part, a connection part and a wall part, each of the wall part and the connection part is bent relative to the bottom part and forms a predetermined angle in relation to said bottom part; and a second component comprising a first part and a second part bent relative to the first part, the second component configured to open or close the first component, the second component comprising a second engagement part protruding from the second part and two auxiliary parts protruding from the first part in a protrusion direction substantially identical to a bending direction of the second part, wherein the second component pivots on the connection part of the first component by the shaft; wherein when the second component closes the first component and the second component, a cable management space is defined by the first component and the second component, and the wall of the first component is engaged between the second engagement part and the two auxiliary parts of the second component; wherein the wall part of the first component has a first side and a second side, the first side is formed with a first engagement part; wherein when the second component closes the first component, the second engagement part is engaged with the first engagement part of the first component, and the two auxiliary parts are located adjacent to the second side of the wall of the first component, a first distance is defined between an auxiliary part and the second side of the wall of the first component, a second distance is defined between the first engagement part and the second engagement part, the first distance is smaller than the second distance; wherein a space is formed between the two auxiliary parts to accommodate a protruded part of the wall part.