The present invention relates to a prefabricated road gutter using a boundary block and a construction method for a prefabricated road gutter. Specifically, the construction method for a road gutter installed in a boundary of a road and a sidewalk comprises: a foundation step of removing foreign substances arranged on the ground in a boundary part of the road and the sidewalk and flattening the ground; a base mortar layer forming step of forming a base mortar layer having coupling protrusions on the upper surface; a gutter block forming step; a boundary block forming step of forming a boundary block coupled to a connection groove unit of a gutter block; a gutter block coupling step of installing the gutter block for the gutter block to be piled in the upper part of the base mortar layer; a boundary block coupling step of coupling the lower part of the boundary block to the connection groove unit; and an asphalt concrete layer forming step of forming an asphalt concrete layer. According to the present invention, the prefabricated road gutter using the boundary block can reduce construction periods by being constructed without requiring a mold process or curing process for forming the gutter block and the boundary block during construction. Therefore, the prefabricated road gutter can be rapidly constructed and reduce costs by reducing processes.
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