Abstract: The causes of generating Benzo (a) pyrene in Oil-tea camellia seed oil was studied by researching production technics (hot pressing,cold pressing,solvent extraction and refining processes) .The results was shown as follows. The Benzo (a) pyrene content of cold pressing oil is (2.56±0.0804)μg/kg,which can meet the safety demand (≤10μg/kg)without refining . The major cause of excessive Benzo (a) pyrene content in the oil extracted by traditional processes is high temperature, rather than solvent. Neutralization and deodoring at high temperature may lead to obvious increase(about 84%~247%), whereas bleaching and winterization may lead to lot of reduce in the Benzo (a) pyrene content(about 71.5%~85.9%). Therefore, in the producing of Oil-tea camellia seed oil, the high temperature condition should be avoiled, the bleaching and winterization process must be used, whereas the technology parameter of neutralization and deodoring must be controled, so that the oil was moderately refined in order to obtain safety edible oil.