A kind of jack knife mechanism of facial mask folding machine,It include: a jack knife group and a cutting die； The jack knife group include one of up and down reciprocatingly the first jack knife,The second reciprocal jack knife of left and right,The reciprocal third jack knife with preceding Hou； The cutting die include one first formwork erection,One second formwork erection,With a third formwork erection； Wherein,First formwork erection receives down stroke and the doubling facial mask converted by first jack knife on first jack knife； Second formwork erection connects the first formwork erection of what side,It receives the advance and retreat stroke of second jack knife and is converted by second jack knife from doubling facial mask and be formed by left folding facial mask； Second formwork erection connects what the second formwork erection back side,It receives the advance and retreat stroke of the third jack knife and is converted by the third jack knife from left folding facial mask and be formed by right folding facial mask.一種面膜折疊機之折刀機構，包括：一折刀組及一刀模；該折刀組包括上下往復之一第一折刀、左右往復之第二折刀、和前後往復之第三折刀；該刀模包括一第一立模、一第二立模、和一第三立模；其中，該第一立模接收該第一折刀之上下行程及被該第一折刀所折合之對折面膜；該第二立模連接於第一立模側邊，接收該第二折刀的進退行程及被該第二折刀折合從對折面膜所形成的左折面膜；該第二立模連接於該第二立模背側，接收該第三折刀之進退行程及被該第三折刀折合從左折面膜所形成的右折面膜。
