The invention discloses a suction type discrete and inclined seam casing treatment control device and method of a compressor. A plurality of discrete and inclined seams are formed in the wall surfaceof a compressor treatment casing in the circumferential direction, and the seams are inclined to the rotor rotation direction by a certain angle; then a certain number of suction holes are formed in the tops of the seams, and a back cavity is additionally arranged on the upper portion of the suction holes; by adjusting the angle of the suction holes, the air pumping volume and the air pumping position, flow vortex structures in the discrete and inclined seams and axial flow amount of the air flow of inflow and outflow of the discrete and inclined seams can be changed, and then the momentum ofa tip leakage flow and a mainstream can be changed; and the position of the interface of the tip leakage flow and the mainstream and flow loss caused by interaction between the seams and the tip flowfield can be adjusted. Compared with traditional discrete and inclined seam casing treatment, suction type discrete and inclined seam casing treatment can achieve the goal of reducing the efficiency loss while increasing the stable working range of the compressor.