The utility model discloses a waste oil separation deposits device, it deposits the mechanism to include oil feed mechanism, hydrocyclone mechanism and produce oil, oil feed mechanism includes the nitrogen cylinder, advances oil pipe with the waste oil tank of nitrogen cylinder intercommunication and intercommunication oil feed mechanism and hydrocyclone mechanism, hydrocyclone mechanism includesthe separator tube, separates the separator tube choked flow baffle that has waste liquid chamber, sets up in the restrictor plate and the intercommunication hydrocyclone mechanism of separator tube below and produce oil and deposit the oil pipe of mechanism, the sediment of producing oil mechanism includes the edible vegetable oil case and sets gradually first division board, second division board and swash plate group at the edible vegetable oil incasement from inlet port to oil outlet, this waste oil separation deposits device simple structure, easy operation, preparation low cost can satisfy high temperature high pressure multiviscosisty experiment and pollute the needs that the multiviscosisty oil separating was retrieved, has solved the multiviscosisty oil difficult problem that unable separation was retrieved after the experiment is polluted, has reduced the experiment cost by a wide margin, has wide application prospect.