The invention relates to a novel method for determining an asphalt-aggregate ratio of a bituminous mixture stress absorbing layer, which comprises the following steps of: determining an asphalt-aggregate ratio AC1 of a bituminous mixture in a tightest embedded extruding state; determining a maximal asphalt-aggregate ratio AC2 of the bituminous mixture without asphalt slurry leakage; determining the maximal asphalt-aggregate ratio AC3 through which dynamic stability and relative deformation meet the requirement in the ranges of AC1 and AC2; and determining a minimum asphalt-aggregate ratio value AC4 meeting the low-temperature tensile strain requirement in the ranges of AC1 and AC2, wherein the selecting range of AC used by the stress absorbing layer is larger than or equal to AC4 and smaller than or equal to AC3, preferably, AC is expressed in the way that 0AC is equal to (AC3+AC4)/2. According to the method disclosed by the invention, a proper numerical value of the asphalt-aggregate ratio of the stress absorbing layer can be favorably designed, and thereby, an optimal numerical value is obtained, and the requirement that the bituminous mixture have higher cracking resistance and high-temperature stability can be more favorably taken into consideration.