A yarn clipping and cutting structure for a striping apparatus installed on a circular knitting machine, the striping apparatus being driven by operation of the circular knitting machine and including a plurality of yarn clipping and cutting structures, each yarn clipping and cutting structure comprising: a first yarn clipping and cutting drive blade (3 a) and a second yarn clipping and cutting drive blade that abut each other and are driven synchronously, the first yarn clipping and cutting drive blade being bordered by a yarn feeding blade configured to lead a colored yarn at one side, the first yarn clipping and cutting drive blade and the yarn feeding blade being interposed by a yarn clipping blade in contact with the first yarn clipping and cutting drive blade, the first yarn clipping and cutting drive blade (3 a) including a first end edge formed a first yarn picking portion moving against the yarn clipping blade to perform a yarn clipping operation, the second yarn clipping and cutting drive blade being in contact with a yarn cutting blade at another side opposing the yarn clipping blade, the second yarn clipping and cutting drive blade including a second end edge formed a second yarn picking portion moving against the yarn cutting blade to perform the yarn cutting operation, the first yarn picking portion including a directing section configured to carry the colored yarn and configured to curve the colored yarn to form a turning point on the colored yarn during performing the yarn clipping operation; wherein the yarn clipping and cutting structure is characterized by; the second yarn clipping and cutting drive blade including a spaced section forming an elevation difference against the directing section between the second yarn picking portion and the first yarn picking portion being configured to form a yarn clipping safety buffer section beyond the turning point. a first yarn clipping and cutting drive blade (3 a) and a second yarn clipping and cutting drive blade that abut each other and are driven synchronously, the first yarn clipping and cutting drive blade being bordered by a yarn feeding blade configured to lead a colored yarn at one side, the first yarn clipping and cutting drive blade and the yarn feeding blade being interposed by a yarn clipping blade in contact with the first yarn clipping and cutting drive blade, the first yarn clipping and cutting drive blade (3 a) including a first end edge formed a first yarn picking portion moving against the yarn clipping blade to perform a yarn clipping operation, the second yarn clipping and cutting drive blade being in contact with a yarn cutting blade at another side opposing the yarn clipping blade, the second yarn clipping and cutting drive blade including a second end edge formed a second yarn picking portion moving against the yarn cutting blade to perform the yarn cutting operation, the first yarn picking portion including a directing section configured to carry the colored yarn and configured to curve the colored yarn to form a turning point on the colored yarn during performing the yarn clipping operation; wherein the yarn clipping and cutting structure is characterized by; the second yarn clipping and cutting drive blade including a spaced section forming an elevation difference against the directing section between the second yarn picking portion and the first yarn picking portion being configured to form a yarn clipping safety buffer section beyond the turning point.