The invention relates to a special warning marker for well lid absence. The special warning marker for well lid absence is characterized in that a marker body is in the shape of a human body, a load-bearing cap body is arranged on the top of the marker body, a bottle mouth body is arranged on the upper portion of the load-bearing cap body, an umbrella-shaped iron hook, a connecting cover and a night warming lamp with a light-operated switch are arranged on the top of the load-bearing cap body in sequence, the umbrella-shaped iron hook is arranged in the bottle mouth body of the load-bearing cap body, an iron hook part of the umbrella-shaped iron hook stretches to the upper end of a cylindrical cavity in the marker body from a hook passing hole in the bottle mouth body, a nylon rope sleeve is fixedly arranged at the lower end of the cylindrical cavity in the marker body, a base protective sleeve is fixedly arranged on the bottom of the marker body, the night warming lamp with the light-operated switch is connected with the connecting cover in a threaded mode, and an argenteous reflective band is arranged on the surface of the marker body. According to the special warning marker for well lid absence, the warning effect is remarkable, vehicles and pedestrians can be effectively prevented from accidentally falling into a well, and damage to the vehicles and casualty accidents are avoided. The special warning marker for well lid absence has the advantages that the anti-theft function, the water-proof function and the snow-proof function are achieved, the weight is low, the marker is convenient to transport, and the manufacturing cost is low. The special warning marker for well lid absence can be used and popularized easily.