The present invention provides a power free mosquito light, which is composed of a cage body, a cover, a light emitting body and a power unit. The cage body is a cage body structure with an opening facing upward formed by bars configured at the bottom and the periphery with intervals of equal distance, and the outer surface of each bar is protruded with bar bristles formed as a structure arrangement making mosquitoes easily flying in but hard to fly out. The light emitting body is configured at the bottom of the cover, and the power unit is connected with the light emitting body for power supply. The cover is configured with a vent hole which the mosquitoes cannot go through, and may cover the opening on the cage body. The heat of the light emitting unit may be dissipated by flowing upward to form a suction air flow for sucking the ambient air inwardly. The bars and bar bristles may be formed as an escape prevention structure for easy-in and hard-out. The present invention may provide the function of power free mosquito catching with a simple structure without a negative pressure fan and achieve the optimized energy saving usage effect in high efficiency and power saving, and also employ the simple structure to reduce the cost and thus increase the consumer acceptance, so as to achieve multiple progressivity.
