A small oil press is a type of oil pressing equipment designed specifically for households or small-scale processing, which can help users extract healthy edible oil from various plant seeds or nuts. When the oil press hammer or screw rotates and applies pressure, it will cause the cells of the seeds or nuts to rupture, and the oil will flow out and gather at the bottom of the oil press barrel. Subsequently, the oil is filtered out of impurities through an oil press sieve and finally collected in an oil bottle. Some high-end small oil presses also have heating function to improve oil yield and oil fluidity.

A household oil press can ensure that the oil consumed by users is fresh, additive free, and pollution-free, thereby avoiding potential health hazards associated with commercially available edible oils. Although the initial cost of purchasing an oil press may be high, in the long run, making edible oil by pressing the oil yourself can significantly save expenses. Modern household oil presses are designed to be more user-friendly and easy to operate, making it easy for even inexperienced users to get started. Many household oil presses are not limited to pressing one type of oil, but can process multiple types of oil crops to meet the different needs of users. Household oil presses usually adopt low-power design and do not generate a large amount of waste during the production process, which is in line with environmental protection concepts.