The invention discloses a warning device for municipal roads. The warning device comprises a base. A disc is movably connected to the top of the base. A connecting rod is movably connected to the topof the disc. A control panel is fixedly connected to the top of the connecting rod. A solar cell panel is fixedly connected to the top of the control panel. A display is fixedly connected to the frontsurface of the control panel. A camera is fixedly connected to the top of the front surface of the control panel. A distance detector is fixedly connected to the front surface of the control panel and located at the bottom of the camera. Through the coordination of the base, the disc, the connecting rod, the control panel, the solar cell panel, the display, the camera, the distance detector, a buzzer, a laser speedometer, a battery, a memory card and a single chip microcomputer, the warning device for the municipal roads solves the problem that an existing warning device does not have the functions of video recording and speed measurement, when a traffic accident occurs, traffic staffs cannot quickly determine the responsibility of the traffic accident, so that the work efficiency of thetraffic staffs is reduced.