The insert-type cementation technology was performed for the surface casing of Well Mengazuodi1, which eliminated the difficuties such as high risk of unstable formation in the long well section, large annulus inside and outside the casing, long operation time. The corresponding technical measures and management measures were formulated according to the characteristics of the insert-type cementation process, which resulted in better cementation quality, construction efficiency increase by 42% and construction cost reduction by 30%. The surface casing cementation over the large-diameter and long-section unstable strata in Yin’e Basin can provides valuable experience for cementation in this area.