The invention provides an oil sand separation technology which comprises six steps of pretreatment, thin oil leaching, water washing, oil-water separation, oil sand soil refining and sand grading. The pretreatment step comprises dry smashing and screening, the thin oil leaching step comprises wet crushing, extraction, solid-liquid separation I, stirring I and solid-liquid separation II, the water washing step comprises stirring II, three-phase separation and rotational flow sand washing, and the oil-water separation step comprises oil tank sedimentation water cutting and oily water oil removal. After oil sand ore is treated through the technology, the extraction rate of oil in oil sand is higher than 95%, the extraction rate of sand in oil sand is higher than 90%, and the oil content in the obtained sand is lower than 1%. Water in the technological process can be recycled, and zero discharge is achieved. According to the technology, the operation pressure and temperature are low, the temperature only needs to be higher than the melting point of crude oil, and energy can be saved. By adopting the technology that thin oil leaching and water washing are combined, the oil water mixture is reduced as far as possible, and therefore the oil-water separation load is reduced; and by adopting the means that gravity sedimentation separation and supergravity sedimentation separation are combined, the treatment effect and capacity are improved.