The invention relates to the technical field of textile and provides a computerized jacquard circular knitting machine and a plaiting technology thereof. The technology comprises the steps as follows:S1, a lower triangle of the computerized jacquard circular knitting machine is transformed to change the moving path of knitting; S2, the transformed computerized jacquard circular knitting machine is used for knitting, when plaiting is required, a control system of the computerized jacquard circular knitting machine controls a middle needle not to press a needle cylinder after loop formation byknitting or tucking, the middle needle makes contact with a triangular guide needle groove curve, the butt of a knitting needle yields, the knitting needle is controlled to hook added yarn in advanceaccording to the pattern requirement before backing yarn, the added yarn is subjected to loop forming knitting on a knockover lower triangle and subjected to pressing knockover at a first knockover needle groove pressing point or a second knockover needle groove pressing point of the knockover triangle together with the backing yarn, and plaiting is completed; S3, the computerized jacquard circular knitting machine can control the lower triangle through the control system to realize intelligent and automatic knitting of multiple patterns and with transformable stitch density. The problems thatexisting computerized jacquard circular knitting machines have few knitted patterns and inconvenience in pattern change are solved.