The utility model provides a block structure and cerini dialyser cerini check out test set, wherein, block structure is used for the interface structure of shutoff cerini dialyser cerini, and block structure includes: connect the cap, connect the cap and have the chamber of holding, connect the first end of cap and set up and hold the connecting hole that the chamber communicates, elasticity shutoff piece, the setting of elasticity shutoff piece is being held the intracavity and is being lain in connecting hole department, the depression bar, the intracavity is being held to at least partly setting of depression bar, and depression bar along the axial displaceable who holds the chamber settings of moving to another place, and the depression bar has to compress tightly elasticity shutoff piece to sentence at the connecting hole makes the deformation of elasticity shutoff piece and the primary importance of shutoff interface structure, and the depression bar still has the elasticity of messenger shutoff piece at the second place of natural state in order to loosen the interface structure. The utility model provides a problem poor to the interface structure shutoff reliability of cerini dialyser cerini among the prior art.