A process of manufacturing a fibrous article includes submerging a fiber substrate in a bath of first thermoplastic resin to impregnate the fiber substrate with the first thermoplastic resin; heating the fiber substrate until the fiber substrate becomes a thick continuous fiber substrate; cutting the thick continuous fiber substrate into units; stacking the fiber substrate units; pressing and heating the stacked fibrous structure units until a stacked fibrous structure is formed; heating a mold; conveying the stacked fibrous structure to the mold to melt; cooling the mold to shape the molten fibrous structure into a half-finished article; removing the half-finished article out of the mold; eliminating burrs and sharp edges of the half-finished article; conveying the half-finished article to the mold; and uniformly applying a molten second thermoplastic resin on an inner surface of the half-finished article by injection molding to produce the finished fibrous article.