The invention discloses a bicycle flicker rear lamp powered by an ultra-micro windmill power generation device, and relates to the fields of machines and electronics. Students need to ride bicycles still after night classes, and at night, motor vehicles behind students cannot see students clearly easily. In order to achieve the purpose, the bicycle flicker rear lamp powered by the ultra-micro windmill power generation device mainly comprises a micro windmill, a micro power generation device, a start-stop button, a red LED lamp bead and positioning clamp equipment. The micro windmill comprises three or more wind blades, the length of each wind blade is about 5 cm, the micro power generation device is an electric generator of a permanent magnet structure, and the boundary dimension of the micro power generation device is about 3 cm*3 cm* 2 cm. Under the condition of the common rotating speed, weak direct current electricity can be generated to be supplied to the red LED lamp bead, and the red LED lamp bead is lightened and flickers. The bicycle flicker rear lamp further comprises a corresponding circuit and electronic element for controlling the lamp bead to flicker. The bicycle flicker rear lamp has the advantages that energy does not need to be additionally consumed, and motor vehicles behind students can be reminded not to be close to the students for a long time.