The invention provides a high-performance conveyor belt wrapping cloth layer, which is formed by cross weaving of warps and wefts; the warp layer and the wefts are a modified polyester industrial yarns; the modified polyester industrial yarns are prepared from the following raw materials in parts by weight: 100-150 parts of polyester industrial yarn slices, 5-20 parts of a functional filler and 10-20 parts of flame-retardant polyester industrial yarn slices, wherein the functional filler is composite particles employing nano calcium carbonate as a core and a acrylamide monomer polymer as a shell. The high-performance conveyor belt wrapping cloth layer is formed by weaving the modified polyester industrial yarns, the wrapping cloth layer has good caking property, long service life and excellent mechanical property, and the flame resistance is improved.