The　recommended　bearing　capacity　of　medium　weathering　mudstone　foundation　is　less　than　the　capacity　of　the　rock　structure　to　withstand　loads　in　Southwest　China.　A　comprehensive　failure　characterization　of　medium　weathering　mudstone　in　Chengdu　has　been　performed　including　bearing　plate　test　(BPT),　binocular　vision　measurement　(BVM)　test,　uniaxial　compressive　strength　test,　trial　trench　test　of　shallow　rock　surface　and　3D　imaging　in　this　paper.　Failure　behavior　of　rock　has　been　modeled　with　3D　imaging　algorithm　that　utilizes　Zhang＇s　calibration　method　in　BVM　system　combination　with　trial　trench　test　of　shallow　rock　surface.　The　bearing　capacity　of　medium　weathering　mudstone　foundation　were　extracted　from　uniaxial　experiments　and　BPT-BVM　test　by　fitting　relevant　material　properties　to　the　data.　The　results　revealed　that:　Bearing　capacity　of　medium　weathering　mudstone　of　layered　isotropic　in　Chengdu　is　undervalued.　Specifically,　the　characteristic　load　carrying　value　is　in　the　range　1500-2500　kP,　that　is　50%　higher　than　in　the　local　standard　system.　Failure　process　is　different　from　Hoek-Brown　Failure　Criterion,　presenting　a　wave　peak　transfer　phenomenon　of　the　increment　displacement　into　the　distance.　Thus,　it　can　be　reduced　to　that　of　punching　failures　for　thin　bedded　structures　of　Moudstone　foundations.　Compressive　strength　of　soft　rock　proves　to　be　main　factor　limiting　the　bearing　capacity,　a　clear　correlation　between　the　uniaxial　compressive　strength　reduction　coefficient　and　the　bearing　capacity　has　been　used　to　establish,　leading　to　the　proposal　of　a　load　bearing　capacity　prediction　model.