A method of origin fermentation includes the following steps: taking fresh leaves, pulping and pulverizing to obtain leaf pulp; Putting the leaf pulp into a fermentation tank, adding sterilized aqueous solutions of ammonium sulfate, ammonium dihydrogen phosphate, ammonium bicarbonate and corn pulp dry powder for fermentation; The fermentation product is subjected to cell crushing, ultrafiltration, low-temperature drying and concentration, and packaging to obtain the original fermentation product. According to the origin fermentation method provided by the invention, fresh leaves are directly fermented by bacteria and enzymes carried by the fresh leaves after being crushed, and no organic solvent, glucoamylase and yeast are added in the fermentation process, so that the fermentation time is short; The main components of the original fermented products are small molecular plant protein, plant growth factors, plant active auxin, some cell growth factors and other active substances beneficial to the skin, and the obtained products are of high quality.