The invention relates to a high-inflaming-retarding low-warping carbon fiber sheet. The sheet is manufactured through laminating and pressing of a plurality of layers of carbon fiber prepreg and at least one layer of plastic horn mesh. A manufacturing process of the high-fire-resistance low-warping carbon fiber sheet comprises the steps of conducting primary impregnation to form the carbon fiber prepreg, stacking the carbon fiber prepreg in a vertically symmetrical mode with the plastic horn mesh as the center layer, and conducting pressurizing and heating curing after laminating. The high-performance plastic horn mesh is adopted and subjected to surface treatment to serve as the sandwich layer of the carbon fiber sheet for electronic products, and by adding the material, weight is further reduced, the functions of reinforcing ribs are realized, inconsistent shrinkage rate caused by anisotropism of a carbon fiber composite material is counteracted, and warping is avoided; the manufactured ultrathin carbon fiber sheet has an inflaming retarding property and is low in deformation degree, low in weight, suitable for bulk production and especially suitable for light-weight application of electronic products.