Enlarge eager native ware of nail dish down

The utility model discloses an enlarge eager native ware of nail dish down should cut native ware and comprise frame construction and functional structure two parts. Wherein, frame construction comprises last fixing base, bracing piece, lower fixing base and fixing support four bibliographic categories branch, the functional structure comprises the lower nail dish and the adjusting bolt of axis, upward nail dish, expansion. The nail dish is the lower nail dish of expansion down, and whole predetermined sample can be accepted to the lower nail dish of expansion, prevents to make when the peripheral soil body of excision the lower part emergence avalanche of soil sample. The utility model has the advantages that the soil sample can furthest guaranteeing finally to make is by disturbance or calcellation, keeps the former column structure of soil sample, improves the quality and the efficiency of soil sample preparation.