The invention discloses a passing solar warning lamp for a power overhead line. The warning lamp comprises an upper lamp housing and a lower lamp housing, wherein the upper lamp housing and the lower lamp housing are connected to each other, a hook is arranged at the top end of the upper lamp housing, a solar panel is installed in the upper lamp housing, an antimagnetic cover is arranged in the solar panel, an antimagnetic cover cap is arranged at the lower end of the antimagnetic cover, a master control circuit board and a storage battery are arranged in the antimagnetic cover, the solar panel is connected with the master control circuit board through a connecting wire and a wire passing hole in the antimagnetic cover, an ultrasonic sensor and a horn are arranged on the lower lamp housing, a sensor circuit board is arranged in the lower lamp housing, LEDs, an infrared sensor and a buzzer are arranged on the sensor circuit board, and both the upper lamp housing and the lower lamp housing are made of light transmitting materials. According to the passing solar warning lamp for the power overhead line, life body approaching detection and foreign matter approaching detection are performed through two sensors respectively, alarm information is given out timely, the overhead line is protected against error collision, and existing energy is saved because a power source is provided through solar energy.