The preparation of pathological sections mainly has the following aspects, including delivery registration, fixation observation, dehydration sectioning, staining and sealing, etc., as follows: first, delivery registration: delivery, receipt, numbering and registration of pathological specimens; second, fixation observation: the received specimens need to go through formalin fixation, visual observation of specimens, histological sampling and recording; third, dehydration sectioning: the tissue of pathological specimens should go through A series of alcohol dehydration as well as paraffin embedding and sectioning; fourth, staining and sealing: paraffin sections are subjected to hematoxylin-eosin staining and finally sectioning and sealing. On this basis, the pathologist is able to observe the tissue sections under the microscope and give a clear pathological diagnosis.