The invention discloses an axial flow compressor blowing-type circumferential groove casing treatment method to solve the technical problem that the stability margin of a compressor treated by the conventional axial flow compressor casing treatment method is poor. The method is characterized in that based on a circumferential groove type treatment casing, tangentially blown air is added to circumferential grooves of the treatment casing, and through experimental measures, the best blowing groove design scheme which obviously improves the stability margin and the efficiency of the compressor is sought. An experimental result shows that with the adoption of the axial flow compressor blowing-type circumferential groove casing treatment method, the flow capacity of an blade top area of an axial flow compressor is improved, the separation of a boundary layer is retarded, the loss of the boundary layer is reduced, a blocking situation of a blade top end wall area is improved, the stable working range of the axial flow compressor is enlarged effectively, and the efficiency of the axial flow compressor is improved to some extent.