The invention discloses an ABAQUS-based soil foundation liquefaction research method which is suitable for the problem of design analysis of liquefaction grounds in civil and hydraulic engineering. The research method is characterized in that 1) numerical simulation in ABAQUS of the soil foundation seismic liquefaction process is realized based on a Byrne liquefaction model and through secondary development of ABAQUS finite element software; 2) for a horizontal ground, a computation formula of liquefaction effect reduction factor continuity is given by utilizing the numerical model and the analysis process above, thereby solving the problem of large jump of "gear" valuing of liquidation effect coefficient of the horizontal ground at present; and 3) for inclined grounds, a correspondence relationship between liquefaction-resistance indexes of the inclined grounds with different inclination angels and excess pore water pressure is given by utilizing the numerical model and the analysis process above. The method states when a liquefaction judgment method in the current standard is applied to the inclined grounds, the liquefaction judgment method needs to be corrected, and a correction method is provided.