This instrument adopts the world's most advanced natural sedimentation liquid-based thin-layer cytology (LCT) technology to complete the automatic preparation and staining of exfoliated cell smears. During the whole process, it adopts automatic microcomputer control to automatically complete the sampling, preparation and staining process without any manual intervention, which can effectively avoid cross-infection and ensure the consistency of preparation and staining, and finally make the cells into monolayer thin slices with clear background and clear diagnostic clues, which can better facilitate the diagnosis and provide more convenience for the diagnosis. The final product is clear background, clear diagnostic clues, uniform distribution of monolayer cell slice, better facilitate the diagnosis.