The invention discloses a knitting device and method of a computerized flat knitting
machine. The knitting device comprises a triangular bottom plate and a knitting
assembly. At least one knitting unit is arranged on the triangular bottom plate. The knitting units and the knitting
assembly are matched for knitting. Each knitting unit comprises an upper left protection hill, a swing triangle, a needle turning triangle, an upper right protection hill, a left needle returning triangle, a right needle returning triangle, a left indexing triangle, a right indexing triangle, a left two-section indexing triangle, a right two-section indexing triangle, a knitting triangle, a disk hill, a guide triangle, a non-knitting press piece and a needle selecting triangle. The knitting
assembly comprises a needle plate body. A needle groove is formed in the needle plate body and internally provided with a knitting needle assembly. The knitting needle assembly comprises a
nest needle, a long needle pin, ashort needle pin and a needle selecting pin. The needle selecting triangle is simple in structural design and easy to
machine, and three needle selecting positions of hanging, knitting and non-knitting are obtained; the bottom plate is more simplified in structure and relieved in weight; by means of the dual-layer indexing structure, seven knitting actions of knitting, hanging, needle turning, needle collecting, non-knitting, tight hanging and tight knitting can be conducted.