Knitting needle assembly of flat knitting machine and flat knitting machine

The invention discloses a knitting needle assembly of a flat knitting machine and the flat knitting machine, belongs to the technical field of flat knitting machines, solves the problem that the operation stability of a knitting needle is easily influenced by the matching mode of the knitting needle and a needle ruler in the prior art, and adopts the technical scheme that the knitting needle assembly mainly comprises a needle bed, the knitting needle and a plurality of insertion pieces arranged on the needle bed at intervals, a needle groove allowing a knitting needle to slide is formed between every two adjacent inserting pieces, a needle pressing device is installed on the inserting pieces and acts on the knitting needle to limit the knitting needle to be separated from the needle groove, the needle pressing device comprises a needle ruler and an elastic pressing strip, the elastic pressing strip is provided with a deformation part, and the deformation part abuts against the knitting needle and deforms so t