Abstract: Besides the high cost, the preforms of C_f/Mg composites sheet-shaped components prepared by the traditional fabrication techniques own the unstable performance. To overcome these disadvantages, a new fabrication technique entitled "Profiling weave-Hoop winding-Oriented placement-Stitched reinforcement" was proposed and consequently the related experimental devices were developed. Based on the experimental investigations, the separate preparations of the circular sheet preform and protruding table preform were fabricated and then protruding table preform was stitched to the sheet preform. The circular sheet preform was fabricated through the radial weave and circumferential winding of the fibers and the combination of the non-woven fabrics and hoop fiber layers, wherein the weft insertion weft tension control in 1.7-2.3 N. The protruding table preform was fabricated through the stack of the horizontal non-woven fabrics. The fabricated sheet-shaped preform preforms have the intact morphology with the uniformly distributed circular and radial fibers. Meanwhile, the C_f/Mg composites sheet-shaped components fabricated by the liquid-solid extrusion process show that the connection between the protruding table and circular sheet preform is of good quality.