Auxiliary tool and system for manufacturing heterogeneous sand-packed model

The utility model provides an auxiliary tool and system for manufacturing a heterogeneous sand-packed model, and the auxiliary tool for manufacturing the heterogeneous sand-packed model comprises a spacer, an extraction assembly and two hoses, metal linings are arranged on the inner sides of the hoses, clamping grooves are formed in the metal linings, the two ends of the spacer are embedded into the clamping grooves of the two hoses respectively, and the extraction assembly is connected with the spacer. Before sand filling, the auxiliary tool is placed in a sand filling pipe, quartz sand of different mesh numbers is divided through the spacer, after sand filling is completed, the auxiliary tool is lifted out through the extraction assembly, the auxiliary tool cannot cause any interference to the displacement process, the quartz sand of different mesh numbers on the two sides of the spacer form sand bodies of different permeability after being pressed, and therefore the sand filling efficiency is improved. Flu