The invention discloses a preparation technique of big-leaf seed tea seed oil. The preparation technique comprises the following steps: (1) squeezing the big-leaf seed tea seed oil: removing impurities, 
drying, husking, separating husks and kernels, 
softening, rolling embryos, braising, stir-frying and squeezing; and (2) refining the big-leaf seed tea seed oil: degumming raw oil, deacidifying, washing with water, 
dewatering, decolouring, deodorizing and filtering. The big-leaf seed tea seed oil prepared by the technique has the advantages of high oil output rate, superior 
oil quality, clear, bright and transparent colour, no 
bitter taste, pure fragrance and good mouth feel, and the nutritive value of the big-leaf seed tea seed oil is furthest protected. The big-leaf seed tea seed oil is not easy to be oxidized and deteriorate, has stable 
oil quality, safety, no 
toxicity, no 
side effect, and favorable properties of storage resistance and high-
temperature resistance, is a better materialfor 
processing powdered oil, oleomargarin, salad oil and shortening oil and also can be used for 
cosmetics and medical oil.