The invention provides a tunnel face anchor rod support design method, and belongs to the field of tunnel engineering. In the design method of the tunnel face anchor rod, a tunnel face damage mode under a mechanized full-section construction method is considered; meanwhile, five tensile failure modes of the GFRP anchor rod of the tunnel face and influences of reinforcing parameters such as the diameter of the anchor rod, the reinforcing density, the initial length, the lap joint length, the tensile strength of the anchor rod, the shear strength of an anchor rod-grouting body interface and the shear strength of a grouting body-surrounding rock interface are considered; and a tunnel face stability coefficient calculation formula is deduced by adopting an extreme balance method, and the GFRP anchor rod quantitative design of the tunnel face is achieved.