The invention discloses a wear-resistant engine flange plate for an automobile and a manufacturing method of the wear-resistant engine flange plate. The wear-resistant engine flange plate comprises aflange plate body, wherein reinforcing plates are welded to a top surface and a bottom surface of the flange plate body correspondingly, positioning plates are arranged on the outer side of each reinforcing plate, and the positioning plates are fixed to the flange plate body through welding. The method comprises the steps that a, an adjusting and fixing clamp is installed; b, a flange plate manufacturing table is adjusted; c, a loading plate is installed; d, connecting holes are formed in the flange plate body; e, a protecting device is installed in each connecting hole; f, the reinforcing plates are welded; g, a connecting boss is welded; and h, grinding is carried out. According to the wear-resistant engine flange plate for the automobile and the manufacturing method of the wear-resistant engine flange plate, the overall thickness of the flange plate is appropriately increased, the mounting precision of the reinforcing plates is improved, the force borne by the reinforcing plates canbe uniformly dispersed, and the overall anti-deformation capability of the flange plate is improved. In the manufacturing method, the flange plate body, the reinforcing plates and the connecting bosswhich are welded in a zoned mode in the later period are all located on the same shaft, and the manufacturing quality is improved; and the adjusting and fixing clamp can be suitable for clamping theflange plates with different thicknesses and different outer diameters.