The present invention relates to an apparatus for installing the main cable (2) on a main tower (1) in a suspension bridge in which both ends (2a) of a main cable (2) are coupled to a pair of main towers (1) A pair of pillars (10) installed upright on the outer sides of the pair of main pillars (1); A fixed rope (20) connecting the upper ends of the pair of pillars (10) and crossing the upper chamber of the pair of main pillars (1); The main cable 2 is moved along the fixed rope 20 so as to run along the fixed rope 20 and the end 2a of the main cable 2 is hooked to the lower end And a lifting portion 32 which is provided to be able to move up and down by the traveling portion 31 and is lowered to a predetermined position of the main tower 1 so that the main cable 2 is aligned with the installation position of the main tower 1 30); A single auxiliary rope (40) connecting the pair of pillars (10) and located below the fixed rope (20); A clamp 50 including a clamp body 51 and 52 fastened to the main cable 2 at a predetermined interval and a clamp row refusal 53 provided at one side of the clamp bodies 51 and 52; And a roller 62 mounted on the single auxiliary rope 40. The carrier body 61 is provided at one side of the carrier body 61 and is connected to the clamp row rejection 53 of the clamp 50, And a support carrier (60) including a carrier row rejection (63) coupled to the support carrier (60).
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