PURPOSE: A pylon of a cable-stayed bridge having a composite coupling structure and a construction method thereof are provided to minimize the increase of cross section of a pylon supporting part because the pylon and the bridge are directly coupled. CONSTITUTION: A construction method of a pylon of a cable-stayed bridge is as follows. A plurality of studs(211) are formed on the inner side of the base of the steel pylon(200). A pylon supporting part(110) is formed and a composite reinforcing rod part is arranged to be extended above the pylon supporting part. A leveler mounting part is formed on the top of the pylon supporting part. A leveler(130) is installed in the leveler mounting unit and carries out leveling in order to horizontally set the pylon formed with the studs. The leveled steel pylon is arranged in the pylon supporting part. Concrete is placed and hardened inside the steel pylon base installed in the pylon supporting part so as to form a composite concrete part(111) which is coupled to the studs and the composite reinforcing rod part.
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