Heavy heterogeneous soil remodeling sample preparation device

The invention provides a large soil preparation device for indoor heterogeneous soil sample preparation. A soil preparation unit is of a graded half-open cylinder structure, a water separation channel/washer and fixing lug buckles improve the leakproofness and quick detaching properties of a layered soil filling model, and the integrity of a soil body before and after a test is maintained; a base vibrator and a soil surface flattener improve convenience and accuracy in the manual making process of a large soil body model; a soil filling frame is of a spliced design, and multi-dimension joint can meet the requirement for internal filling of heterogeneous bodies of various sizes; for soil compaction, a manual rotation jack is adopted for compression, the compression thickness is controlled by the number of screw-in circles of a thread, and the purpose of controlling the density of the soil body is achieved.