The invention discloses a method for
cutting a sleeve of a western style suit, which comprises the following steps of: firstly, acquiring a value required by
cutting of the sleeve, measuring a net
chest circumference value and a net back length value of a
human body, determining a
chest circumference value and a back length value of a garment body prototype according to the obtained data, determining the garment body prototype, determining a front arm hole
line length and a rear arm hole
line length of the sleeve according to the garment body prototype, and measuring the arm of the human bodyto determine a sleeve length value; secondly, determining a sleeve width value and a sleeve cap height value of the sleeve, wherein the sleeve width value is equal to the sum or the difference value of one third of the
chest circumference value of the garment body prototype and a, a is less than or equal to 5cm and more than or equal to 0, the sleeve cap height value is determined by drawing a triangle by using the sleeve width value as the bottom edge, using the front arm hole
line length value as one side edge and using the length of the sum of the rear arm hole line length and b, the altitude length of the triangle is used as the sleeve cap height value, and b is less than or equal to 1.5cm and more than or equal to 0.5cm; and thirdly, determining a
reference line and a finished line of the sleeve and finally carrying out
cutting of the sleeve according to a formed structure curve of the sleeve. The method is simple and convenient to operate. The sleeve
cut by adopting the method has high fit accuracy, so that the cutting efficiency of the suit can be effectively improved.