The invention relates to an aviation obstruction light system based on optical path prompting. The system comprises multiple light bodies installed on an obstruction object, a second light body, an optical path mirror, a communication device, and a control processor. The first light bodies are installed on corners of the obstruction object. At least two first light bodies are arranged on the sameseamed edge of the obstruction light. The second light body is arranged on one side of the first light bodies and the optical path mirror is arranged on the other side of the first light bodies. The optical path mirror and the second light body are arranged on the same straight line. The communication device is connected with the control processor. The control processor and a ground control centercommunicate with each other through the communication device. The control processor is connected with the first light bodies and the second light body. If an airplane is about to get close to the overhead place of the obstruction object, the ground control center output a first prompting signal to the communication device, the communication device outputs the first prompt signal to the control processor and the control processor outputs a starting signal to the second light body according to the first prompt signal.