The invention provides a cable core wire identification device and a use method thereof. The cable core wire identification device comprises an input unit, a display unit and an identification unit. The input unit, the identification unit and the display unit are interconnected via an internal circuit. The identification unit is used for identifying cables connected on the identification unit and displaying an identification result on the display unit. The input unit is used for inputting a control instruction and an identification instruction. According to the cable core wire identification device, corresponding identification numbers can be displayed on the cable core wire identification device of the two ends of the cables via a mode that a loop is formed by a shielding layer and each cable core wire so that an objective of identifying all the core wires of the cables simultaneously is achieved.