The invention discloses a warning frame for construction, which includes a base, a lifting device, a vertical rod, a voice device, a flashing light, a horizontal rod, a lifting rod, a telescopic device and a fixing device. The vertical rod is installed on the base, and the The suction cup is installed on the lower surface of the base, a counterweight is installed at the inner bottom of the vertical bar, the storage battery is installed inside the vertical bar, the voice device is installed at the top of the vertical bar, and the horizontal bar passes through the fixing device Installed on the vertical bar, the telescopic device is installed on the horizontal bar, the flashing light box is arranged on the horizontal bar, the lifting rod is installed at the bottom of the flashing light box, and the flashing light is installed on the lifting bar , the electrical input of the storage battery is connected to a voice device and a flashing light, and a control panel is installed on the outer surface of the vertical rod. The invention is equipped with flashing lights to remind passers-by at night that the front is a construction site, which greatly improves the safety warning effect.