A set of effective mud technology was designed and applied to reduce the burying depth of steel casing and ensure the recovery in the large diameter bottom-enlarge grouting pile construction of MGM Grand Macao. The high inhibitive low solid mud was made with high quality bentonite and KHm treating agent which can reduce viscosity and inhibit hydration dispersion of formation. Air lift reverse circulation system was applied to clean the borehole, surface great circulation system to schedule mud and adjust mud property, intensified gravitative sedimentation and cyclone desanding to remove cuttings. The cuttings and wasted mud was carried away to avoid environment pollution after hardening treatment with low grade cement. The measures for reducing loss and cost were put forward by the calculation analysis on mud wastage.