The invention discloses a self-power-generating type energy-saving lifting streetlamp based on a connecting rope tightening principle. The self-power-generating type energy-saving lifting streetlamp comprises a base, wherein a lamp post is fixedly connected at the upper side of the base; a groove with an upward opening is formed in the lamp post; a lifting column is arranged in the groove; two guide slots are symmetrically formed in the inner side wall of the groove; guide rods are arranged in the guide slots; the other ends of the guide rods are fixedly connected with the side wall of the lifting column; the guide rods are connected with the bottoms of the guide slots through supporting springs; the lower part of the lifting column is fixedly connected with a pull ring; a connecting ropeis connected on the pull ring; a first rotary shaft is arranged on the bottom inside the groove; the first rotary shaft is horizontally arranged; the two ends of the first rotary shaft are rotatably connected with the side wall of the lamp post; the left end of the first rotary shaft is fixedly connected with the output shaft of a first motor; and a rotary disc is fixedly connected on the first rotary shaft. The self-power-generating type energy-saving lifting streetlamp has beneficial effects that height of the lifting column is reduced through the connecting rod when the connecting rope is wound on the rotary disc, so that height of a lamp holder is reduced through the lifting column.