The present invention relates to a cold runner block system. According to one embodiment of the present invention, the cold runner block system comprises: a manifold unit including a gate to which a liquid thermosetting resin is injected, a flow path through which the liquid thermosetting resin injected through the gate flows, and upper and lower manifold blocks sharing the flow path; a nozzle unit including a nozzle body which is formed in a lower part of the manifold unit, discharges the liquid thermosetting resin flowing along the flow path through a tip part, and has a spiral cooling line therearound, a nozzle flange which is integrated with an upper part of the nozzle body and is connected to the lower manifold block, a nozzle housing which is formed at the outside to surround the nozzle body, a nozzle cover which is formed between the nozzle flange and the lower manifold block, and an elastic body which is formed between the nozzle cover and the nozzle flange, and elastically supports the nozzle body; and a cylinder unit formed on an upper part of the manifold unit, and including a cylinder in which a valve pin for discharging the liquid thermosetting resin toward a cavity of an injection mold is installed to be lifted.
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