The invention discloses a glass fiber/epoxy resin composite material substrate type fiber bragg grating sensor and a manufacturing method thereof. The sensor comprises a glass fiber/epoxy resin composite material substrate, at least one fiber bragg grating loaded on the glass fiber/epoxy resin composite material substrate and dry glass fiber cloth covering above the fiber bragg grating. The dry glass fiber cloth is infiltrated by liquid epoxy resin. The liquid epoxy resin is filled between the dry glass fiber cloth and the glass fiber/epoxy resin composite material substrate so as to carry out curing molding. In the invention, interlayer interface intensity of the fiber bragg grating sensor is guaranteed, based on that, a series of defects existing in a traditional fiber bragg grating sensor are overcome; the fiber bragg grating sensor can accurately measure a temperature and strain of a measured structure component; disadvantages of a domestic current externally-bonded fiber bragg grating sensor are avoided; and simultaneously good economic benefits are possessed.