The invention discloses a needle selection method of single segment for computer knitter and the equipment adopting the method. In the invention, the stitch of needle body of needle selection is made of magnetic material; electromagnetic field, which can play the magnetic force to the stitch, is set in the needle selection machine; according to the direction transformation of magnetic force in the needle selection machine the movement position of each needle body of needle selection, which passes through the magnetic field, is confirmed; the needle selection of single segment is achieved. The invention adopts changing the direction of magnetic field to accomplish the action of needle selection. In a short time, by the force that takes an effect on the stitch of needle body of needle selection through the magnetic force, the selection to needle body is accomplished and the entering needle position is controlled so as to accomplish the whole needle selection work. So the invention does not adopt the needle selection of multiple segments and it only adopts the needle selection of single segment to accomplish the needle selection. The structure is very simple.