Six-station liner jacquard circular weft knitting machine and knitted liner jacquard knitting process

The invention relates to the technical field of textiles, and provides a six-station liner jacquard circular weft knitting machine and a knitted liner jacquard knitting process. A lower cam comprises one or more groups of mutually matched liner cams for knitting a liner to perform liner yarn needle selection, surface yarn cams for knitting floating threads on the liner to perform looping or pre-looping and tucking surface yarn needle selection, and plain weave cams for knitting ground yarns on the liner to perform plain weave needle selection; the inlet end of a first needle groove of each liner cam is provided with a needle position needle selection groove, and the outlet end of the first needle groove of each liner cam is correspondingly provided with two needle outlet grooves; a third needle groove of each surface yarn cam is sequentially provided with a needle position needle selection groove, a floating thread and looping needle position needle selection groove and a pre-looping and tucking needle positi