According to the method of shoulder′s pattern making in Pattern making for fashion design,the characteristic of the back shoulder-waist slash path is introduced,and the importance of the determine about the back shoulder-waist slash path is analyzed.It is proved that the measuring path of back shoulder-waist slash in theory is not accurate through 3D body scanning measurement,and the more accurate measurement path of the back shoulder-waist slash is obtained through manual adjustment,which provides more accurate data for pattern making of back shoulder and improves the rationality of the pattern design of the shoulder.