The utility model discloses a safety barrier belongs to safety barrier technical field. Including articulated formula expansion network, LED lamp area and two portable bases that are equipped with the pole setting, install respectively in the pole setting of portable base at articulated formula expansion network's both ends LED lamp area all is equipped with on articulated formula expansion network's upper and lower both sides, is equipped with voice prompt and warning lamp in the pole setting upper end of portable base. Install the battery on the portable base, LED lamp area, voice prompt and warning lamp are connected to the battery. Be equipped with the wheel below the portable base, the wheel quantity of every portable base is more than 3. The utility model discloses simple structure, can remove convenient and fast according to the nimble installation of job site topography at simple to operate, voice prompt selects the induction type, sends alarm sound in case someone is close automatic, and this safety barrier has greatly strengthened the practicality, has guaranteed pedestrian, driving and site operations personnel's safety.