A technology for preparing salviae miltiorrhizae oral liquid with a ceramic membrane is characterized by comprising the following steps of decoction, concentration, centrifugal filtration through a high-speed centrifuge, primary filtering by ceramic membrane with the hole diameter of 150000-180000 molecular weight, secondary filtering by ceramic membrane with the hole diameter of 80000-120000 molecular weight, ultrafiltration by ceramic membrane with the hole diameter of 20000-50000 molecular weight, nanofiltration concentration by ceramic membrane with the hole diameter of 300-450 nanometers, concentrating medicine liquid to the amount 2.5-3.5 times that of medicinal materials, final preparation and embedment sterilization. Heating processes in the whole technology course are reduced, ceramic membrane filtering with different molecular weights and refining under normal temperature are carried out, impurities are effectively removed, effective constituents are reserved to the maximum degree, an extracting technology is shortened, pollution is lowered, energy is saved, clean production is achieved, the technology accords with traditional Chinese medicine theoretical system, an ultrafiltration membrane filtering technology is used, degerming and pyrogen effect is good, and the clarity of medicine liquid is guaranteed and improved.