Method of preparing end of yarn for spinning on rotor spinning machines and spinning rotor

In the present invention, there is disclosed a method of preparing end of yarn for spinning on rotor spinning machines and a spinning rotor. The machine comprises a spinning rotor disposed within a vacuum chamber connected through the mediation of a vacuum channel to a vacuum source. The yarn is drawn via a take-up tube and an inlet into a vacuum channel, whereupon edge of a rotating spinning rotor breaks the yarn between the inlet and the vacuum chamber to thereby creating end of yarn onto the introduced yarn for spinning. The spinning rotor inlet opening edge is provided with incision, which ensures break of the yarn.