Manufacturing process of front leather shoe upper

The invention discloses a manufacturing process of a front leather shoe upper. The manufacturing process is characterized by comprising the steps of 1, according to the size of a front leather shoe upper piece, cutting out flat leather facing; 2, coating the reverse side of the leather facing with hot melting forming adhesive according to forming warp and weft; 3, pasting forming lining cloth, pasting forming cloth on the reverse side of the leather facing, wherein the overall edge of the forming cloth is 3-7 mm shorter than that of the leather facing, and the tensile direction of the forming cloth is two-side tensile; 4, carrying out warpage forming, using heat steam to heat the front upper piece on which the forming lining cloth is pasted, and conducting heat forming on two lines by aligning center lines of the warp and weft; 5, pasting red cardboard filling, making a red cardboard according to the size of a last type arc upper piece, wherein the two sides of the red cardboard is coated with adhesive layers