1. Cleaning: Clean soybeans first to remove impurities and foreign bodies.
2. Crushing: Crushing washed soybeans for subsequent oil extraction.
3. Steam-frying: Steam-frying crushed soybeans to make them reach appropriate temperature and humidity, which is beneficial to the precipitation of oil.
4. Squeeze: Squeeze with a special stupid soybean oil press to separate the oil from the soybean.
5. Filtering: The pressed crude oil needs to be filtered to remove solid particles and impurities.
6. Refining: the filtered crude oil is sent to the refining workshop for refining, including the steps of hydration degumming, alkali refining for deacidification, decoloration and deodorization, so as to improve the quality and stability of the oil.