A glass fiber and method for producing the same are provided. The method includes a covering process, a sintering process, a mixing process, and drawing process. The covering process is implemented by covering a tungsten compound onto a plurality of surfaces of a plurality of inorganic particles to form a plurality of modified inorganic particles. The sintering process is implemented by sintering the modified inorganic particles in a nitrogen atmosphere having a temperature of between 400 C. and 1,000 C. The mixing process is implemented by mixing the modified inorganic particles into a glass raw material that is in a molten state. The drawing process is implemented by drawing the glass raw material mixed with the modified inorganic particles to form a plurality of glass fibers.