The present invention relates to a kind of production methods for preparing functional Low-salinity beans sauce comprising: step prepares rich potassium sericite suspension because utilizing sericite Pharmacology element extraction step, the decompression of mixing blood and rich potassium Chinese herbal medicine, impregnate with defined ratio the sericite suspension of ethyl alcohol-containing, and then obtain pharmacological element first is extracted to third extract by low temperature Forming step, soybean soaking squeeze first and arrive third extract, 4 points of 58 minute hours of bean or pea for immersion, it is made coffee beans two hours by the bean or pea that boiling is impregnated, cooling puchow preserved soybean is to 30 to 40 degrees Celsius, and forms soybean agglomerate and have predetermined shape and improve the concentration of potassium, by being mixed into 1% 0.Aspergillus in 1%, 5% 30% and has transplanted powder to grain, and to the potassium compound in 15% 5% as salt substitute, relative to the soybean Fermentation step fermentation soybean block at least 3 days to 15 30 40 degrees Celsius It washs with immersion step (=primary curings) with bulk of fermenting, is put into container, be dipped in and adjust the reduction potassium class compound that its salinity has bitter taste by injection first to third extract, then carry out curing three to six months. Functionality Low-salinity thick broad-bean sauce according to the present invention allows people to avoid excessive sodium intake and hypertension. In addition, the various pharmacological activity elements that it allows to take in improve for health.The 2017 of copyright KIPO submissions