Method for manufacturing recycled carbon fiber underlay and recycled carbon fiber arch insole with recycled carbon fiber underlay

A recycled carbon fiber arch insole, comprising:

• a recycled carbon fiber underlay;
• a first cushion layer stacked on the recycled carbon fiber underlay;
• a graphene underlay stacked on the first cushion layer;
• and
• at least one second cushion layer sandwiched between the recycled carbon fiber underlay and the first cushion layer,
• wherein the recycled carbon fiber underlay has a specific contour, and the specific contour depends on a plurality of corresponding contour statistical values of a numeric database, the plurality of corresponding contour statistical values include a contour statistical value corresponding to a foot middle median length, a contour statistical value corresponding to a foot medial median length, a contour statistical value corresponding to a foot lateral median length, a contour statistical value corresponding to a forefoot width of a foot, a contour statistical value corresponding to an arch width of the foot, a contour statistical value corresponding to a heel width of the foot, a contour statistical value corresponding to a top height of a medial arch of the foot, a contour statistical value corresponding to a position of the medial arch of the foot, a contour statistical value corresponding to a top height of a lateral arch of the foot, and a contour statistical value corresponding to a position of the lateral arch of the foot.