The invention provides a control method for allowing a tailoring head to automatically adjust a cutting direction of a blade. The control method includes: 1) presetting a tailoring coordinate system,wherein the tailoring coordinate system and the blade are mapped to each other; 2) receiving a tailoring command, wherein the tailoring command has a coordinate of a tailoring start point, a tailoringblade moves to the designated tailoring start point; 3) receiving a coordinate of a tailoring designated point, forming a right triangle in the tailoring coordinate system according to the coordinateof the tailoring start point and the coordinate of the tailoring designated point, and calculating a rotation angle of the blade; and 4) outputting a rotation command to a blade rotation motor, and allowing the blade to rotate according to a rotation angle, completing adjustment of the cutting direction of the blade, and performing cutting. The coordinates of the tailoring start point and the tailoring designated point are input, the two coordinates are used to construct the right triangle in the tailoring coordinate system so as to calculate the rotation angle and the rotation direction of the blade, and automatic determination of the blade can be achieved.