The invention discloses a sweet oil condiment which is prepared by fermenting two strains due to modes of raw material treatment, size mixing, liquefying, cooking, inoculating, thermal insulation and fermentation, squeezing, primary sterilization, oil blending, secondary sterilization and discharging. The obtained sweet oil is fresh, sweet, light in color, amber, strong in aroma and pure in flavor. According to the sweet oil provided by the invention, in the preparation process, the strain culture and fermentation temperature and time control are greatly innovated, compared with the original weather exposure, the production period is shortened from 6-12 months to 20 days due to a traditional natural fermentation process, the labor efficiency is improved, the physical labor intensity of workers is alleviated, and all characteristics of the sweet oil product are kept. According to the thermal insulation and fermentation sweet oil, a liquid enzyme process is adopted, so that mechanical and pipeline type sweet oil production is realized, and the physical labor intensity of workers is alleviated. Moreover, the raw material utilization rate is improved, the labor efficiency is improved, and the sweet oil condiment is an innovation of a biological fermentation technology in condiment brewing industry.