The invention discloses a framework-type concrete guardrail heightening device. The framework-type concrete guardrail heightening device comprises a guardrail concrete basic body, wherein the guardrail concrete basic body is provided with a prefabricated concrete framework which is matched with the guardrail concrete basic body; the prefabricated concrete framework comprises a front framework plate I and a rear framework plate II, a pouring groove is arranged between the framework plate I and the framework plate II in a splicing manner by virtue of a connecting plate, concrete is poured in the pouring groove, and a through hole longitudinally penetrating through the connecting plate is also formed in the middle part of the connecting plate; the prefabricated concrete framework is matched with the guardrail concrete basic body by virtue of a plurality of planted ribs I, and a plurality of prefabricated concrete frameworks are connected with each other by penetrating a plurality of planted ribs II through the through hole. The framework-type concrete guardrail heightening device has the beneficial effects that the complicated binding ribs and supporting templates can be effectively completed in a factory, and an effect of convenience in on-site construction and short period can be realized.