The guardrail of one of prefabricated component for landscape architecture is provided to the environment of nature close friend and improves the appearance of the city avoid log member by forming one, by having a simple structure to make to install and safeguard to be easy. The guardrail of one of prefabricated component for landscape architecture is by providing made of synthetic resin and forming many column frames (10) by the log setting unit of semi-cylindrical and formed, it is continuously connected column frame, use fixed device, such as part and fruit stone, with setting log member (50), it has specified height and diameter for each log setting unit, wherein log member is arranged, and the setting device cut without axe is fixed by the bolt member (B) for being coupled to log member by the rear portion of log setting unit.
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