To promote the application of the swept strut in the supersonic combustor to solve the problem of thermal protection and resistance reduction of the strut injector at high flight Mach number, the kerosene mixing characteristics in the combustor equipped with a swept strut were studied by numerical simulation under the condition of Ma = 2.8, Pt = 1.68 MPa and Tt = 1680K. The results show that the kerosene deflection will occur in the combustor, and the kerosene is mainly enriched in the boundary layer of the combustor wall, which makes the kerosene's local mixing performance poor and the combustion efficiency low. Further analysis indicates that the kerosene deflection characteristics are mainly caused by the transport effect of the counter-rotating vortex pair (CVP) and the pressure distribution characteristics of the strut surface. To improve the phenomenon of kerosene enrichment and the uniformity of kerosene distribution, the regulation of kerosene deflection characteristics was studied from strut configuration design and kerosene distribution of strut injection orifices. The results show that the uniformity of the kerosene distribution can be improved by selecting the appropriate strut height, the trailing-edge swept angle of the strut and the step angle of the strut. The kerosene mixing efficiency and the uniformity of kerosene distribution can be improved by grouping the kerosene injection orifices of the strut and assigning the appropriate equivalence ratio to each group of injection orifices.