FIELD : medicine.SUBSTANCE : invention relates to medicine, particularly to cardiovascular surgery. Perform annuloplasty of fibrous ring (FR) of the mitral valve (MV). For the remodeling of the MV FR form, the FR circle is conventionally divided into two semicircles and, accordingly, into six segments : A1, A2, A3, belonging to the front semicircle, and P1, P2, P3, related to the rear semicircle. Fixing stitches are applied to all segments of P2 and A2, as well as to the medial halves of A1, A3, P1, P3 segments. Commissural zones of FR are free from suturing.EFFECT : method allows to reduce the incidence of complications after annuloplasty of MV, as well as to provide conditions for the growth of native FR in children.1 cl