Abstract: The effect of embedding of soybean powder oil with single embedding medium and composite embedding medium were studied in the article. The embedding medium with good effect was optimized and improved the effect through compound. The optimal formula of microcapsule soybean oil powder was confirmed through an orthogonal test. The formula was 50% first grade soybean oil, 2.5% casein acid sodium, 2.5% modified starch, 0.6%single Kennedy ester, 1.4% sucrose ester, 42.5% maltodextrin and water, the concentration was 40%. The embedding rate of the production reached 92% by using the formula and process conditions.