A prefabricated mold for construction of a concrete pavement capable of being easily assembled, installed and disassembled and being repeatedly re-used is provided. The prefabricated mold includes coupling segments taperedly installed at both upper and lower ends of the mold to be butt-coupled to each other, fixing rod insertion holes formed through an upper central region of the mold and formed through the coupling segments formed at both sides of the mold, coupling grooves installed in a plural number to protrude from an inner surface of the mold having an internal space formed therein, finishing plates having a plurality of protrusions formed therein to be inserted into the coupling grooves, fixing rod insertion holes formed at the mold having a slope segment installed at a front upper portion thereof by injection-molding the mold using a synthetic resin material, and fixing rods inserted respectively into the fixing rod insertion holes to fix the mold on the ground.