Road anti-collision warning device

The utility model relates to the technical field of road anti-collision equipment, in particular to a road anti-collision warning device which comprises a machine frame and a flag waving warning mechanism arranged on the machine frame, the machine frame comprises a support and a main body, the flag waving warning mechanism comprises a first rocker arm and a second rocker arm, and the first rocker arm and the second rocker arm are arranged on the two sides of the main body respectively. A lifting mechanism is arranged between the main body and the support and used for driving the main body to ascend and descend relative to the support so as to adjust the height of the flag waving warning mechanism. According to the road anti-collision warning device provided by the utility model, the lifting mechanism between the main body of the rack and the support drives the main body to lift relative to the support, so that the height of the flag waving warning mechanism can be effectively adjusted to a proper position, an