We have extended the average-bond-energy method to study the strained-heterojunction band offset. Through a detailed study of the effect of hydrostatic and uniaxial strains on the energy of the average valence band edge E_v.av relative to the average bond energy, we find that E_v.av remains basically unchanged under different strain conditions, and that the deformation potential a_v.av corresponding to E_v.av is much smaller than the a_v for other analogous methods. Thus, in the average-bond-energy method, the valence band offset ΔE_v can be obtained neglecting a_v.av. It is only necessary to calculate the valence band maximum energy relative to the average bond energy before the strain and to use the experimental values of the deformation potential b and spin-orbit splitting Δ₀ to determine the splitting value for the valence band. It is not necessary to calculate the band structures under various strain conditions. This simplified calculation method involves only a small calculational burden; therefore, it can conveniently be used to predict the strained-heterojunction band offset.