The invention relates to a paraffin wax slicing method of ocean shellfish oocytes, comprising the steps of fixing, dehydration, clarity, waxdip, imbedment, slicing, dyeing, mounting, and the like. Theparaffin wax slicing method is characterized by solving the problem of the difficult waxdip and imbedment of the ocean shellfish oocytes due to small volume, improving a hematoxylin-eosin dyeing method and obtaining favorable slicing and dyeing effect. The paraffin wax slicing method is simple and easy to operate without adding instruments or equipment, can carry out paraffin wax slicing on mostof the ocean shellfish oocytes with the diameters more than or equal to 40 micrometers, transition steps are carried out among the dehydration, the clarity and the waxdip of the steps and mostly in two-step processing so that a reagent gradually and completely enters a tissue and is preserved in the original structure of the tissue in an intact way so as to provide an effective researching means for shellfish fertilization and early embryonic development research.