The invention discloses a clean process for producing leather by using sturgeon skin, which comprises the following steps of: immersing sturgeon into water, manual meat removing, degreasing, oil slick scratching, ash immersing, dying, ash immersing, oil slick scratching, ash restoring, oil slick scratching, deliming without ammonium, oxidation bleaching, acid etching, reduction bleaching, softening, organophosphorus tanning or oxazolidine tanning, dyeing and fat-liquoring, aluminum retanning or zirconium retanning, washing, hung airing and drying and finishing. According to the clean process, the sturgeon skin is tanned by adopting an organophosphorus tanning or oxazolidine tanning agent and a chrome-free tanning process; a less-sulfur liming and deliming without ammonium clean process is adopted in the tanning process, so that the harm of heavy metal chromium to the environment and a human body can be avoided, the emission of sulphide and the consumption of lime are reduced, the content of ammonia nitrogen in wastewater is reduced and the cost of sewage treatment of enterprises is saved; in addition, the produced environmentally-friendly sturgeon skin is soft in hand feeling, plump, rich in elasticity and flat and fine in particle surfaces, and keeps beautiful and complete natural squama.