That earthworm oil has medicinal value is, however, an accepted fact, but to date myself and associates have not found a satisfaction method to instructions to extract the oil in sufficient quantities to raise it to meet even a small commercial demand. I have used very Primitive methods to extract the oil, which must be done by heat - to which earthworms are very susceptible. The method used was slow, tedious and annoying, though I have managed, by painstaking efforts, to garner well over a gallon over months of Experimenting.

The nutrient composition of homemade earthworm powder and the storage stability under different temperature and humidity were studied. The results showed that the protein content of "earthworm powder" was 69.52%. A total of 16 amino acids were identified. The required amino acids / total amino acids were 36.4%. The essential amino acids / non-essential amino acids were 61.62%. After 28 days of storage of earthworm powder, the acid value increased with the passage of time. The higher the temperature, the higher the water and humidity. The acid value of the samples was 3.61 ~ 5.84 mg / g after 28 days of storage at 20, 30 and 50%, respectively. The values ​​of peroxide were decreased at the beginning of storage and then increased. At the same time, the earthworm powder 28d after the 'pepsin digestibility did not change significantly' are more than 88% 'meet the feed fish meal grade 86% of the national standard. In the test temperature and humidity within 28 days after storage 'earthworm powder still maintain a good quality' that the earthworm powder can be used as high-quality feed protein.

Provided is a method for manufacturing dried earthworm powder containing high potency enzymes while removing harmful substances contained in the earthworm. The manufacturing method is characterised by: a live earthworm being brought into contact with a chloride of at least one metal selected from the group consisting of potassium, sodium, magnesium and calcium; followed by the live earthworm being brought into contact with a hydroxy carboxylic acid powder, diluted with water to adjust to a pH of 2-5, and preserved for 3-180 minutes; and the live earthworm being washed with water and ground, and the obtained ground material being freeze-dried.

Freeze dried earthworm powder is about 3.97% which not only the pretty good pet feed but also can be using in the file of medicine, food,  health products, cosmetics and etc.