The invention discloses a vertical shaft steel wire rope guide sliding sleeve wear amount detecting device and a detecting method thereof. The device comprises a plurality of FPC flat cable units, a plurality of voltage detecting circuit units, a control system and a data display device, wherein end faces of two ends of the vertical shaft steel wire rope guide sliding sleeve are respectively provided with the plurality of FPC flat cable units, the plurality of FPC flat cable units are sequentially attached to end part surfaces of the vertical shaft steel wire rope guide sliding sleeve along anouter periphery of a rope hole of a steel wire rope so as to form an enclosure; each FPC flat cable arranging unit is connected to a voltage detecting circuit unit; a signal input end of the controlsystem is in signal connection with a plurality of voltage detecting circuit units, a signal output end of the control module is connected to a wireless transmission module through an output circuit,and the data display device receives data transmitted via the wireless transmission module through the data receiving module. According to the vertical shaft steel wire rope guide sliding sleeve wearamount detecting device and the detecting method thereof, a conventional sensor is replaced with an FPC flat cable to detect a wear amount; the device and the method disclosed in the invention are advantaged by reliable work, high efficiency and the like.