Cementing basket is a isolation device used in the process of suspending the sealing of segments to prevent the occurrence of displacement and settlement between the grout and drilling liquid. It amounted on the bottom of the suspend sealing segment. It used to support the grout in the annular, it can prevent or reducing the loss of the grout and protect the weak stratum structure, in order to prevent the excessive weight of cement segment static pressure. It usually mounted on the casing string on the above of weak stratum structure, but it also used on the stage cementing and surface cementing. Each fin of the basket can provide maximum flexibility and fluid channel while maintaining optimized support feature.