Based on the simplified softened strut-and-tie model （SSSTM）， the calculation formula of the angle of diagonal concrete strut inclination is modified by considering the effect of the axial compression ratio. Based on the shear-lag model， a calculation formula of fiber tensile stress per unit area of the crack surface is established by considering the number of fibers and fiber orientation characteristics of the crack surface. The modified simplified softened strut-and-tie model （MSSSTM） is proposed for the calculation of the shear capacity of steel fiber concrete reinforced beam-column joints. The MSSSTM and SSSTM were used to calculate the shear capacity of 36 steel fiber reinforced concrete beam-column joints. The results show that the average experimental-to-predicted capacity ratios of MSSSTM and SSSTM are 1.01 and 1.05， respectively， and the corresponding coefficients of variation are 0.04 and 0.09， respectively. The calculated values of shear capacity of steel fiber reinforced concrete beam-column joints according to the MSSSTM model are in good agreement with the experimental values with less dispersion. Moreover， the MSSSTM can reflect the influence of axial compression ratio and concrete strength on the shear capacity of joints more reasonably.