The utility model provides a changeover portion of highway wave form roof beam guardrail and cable guardrail, it is including wave form roof beam guardrail board, wave form roof beam guardrail end, cable guardrail, cable guardrail end, wave form roof beam guardrail end connect wave form roof beam guardrail board get into the cable guardrail inboard form with wave form roof beam guardrail board and cable guardrail crossed and superposed, realizes that two kinds of guardrails protect rigidity or intensity smooth transition, division have the through -hole on wave form roof beam guardrail board, the cable reach through hole of cable guardrail and mistake. Wherein, wave form roof beam guardrail board install the wave form roof beam guardrail that increases gradually additional and cross the cab apron being close to wave form roof beam guardrail end department, cross the cab apron and make wave form roof beam guardrail protection height protect with the cable guardrail highly to reach unanimity, realize smooth connection between two kinds of guardrail section type of construction through installing wave form roof beam guardrail additional. The beneficial effects of the utility model are that: the structure is continuous, construction convenience, and whole effect is pleasing to the eye, is applicable to the smooth transition between wave form roof beam guardrail and the cable guardrail.