To　overcome　the　problem　that　the　shape　of　failure　envelope　for　shallow　foundations　with　larger　embedment　to　breadth　ratio　tends　to　be　complex,　a　numerical　procedure　to　search　the　optimal　load　reference　point　was　proposed,　according　to　force　translation　theorem,　for　shallow　foundations　under　horizontal　and　moment　combined　loading　in　uniform　and　inhomogeneous　soil.　Swipe　loading　method　and　fixed　displacement　ratio　loading　method　were　combined　to　conduct　plane　strain　finite　element　analysis.　The　two-dimensional　failure　envelope　based　on　the　optimal　load　reference　point　tended　to　be　more　symmetric　and　simple,　compared　with　that　based　on　the　center　of　shallow　foundation　base.　Then,　a　unified　equation　was　proposed　for　describing　the　two-dimensional　failure　envelope　of　shallow　foundations.　Results　show　that　the　bearing　capacity　of　shallow　foundations　subjected　to　horizontal　and　moment　combined　loading　is　reasonably　evaluated　utilizing　the　equation.