Method for producing ursodeoxycholic acid by using swine bladder as raw material

The invention provides a process of separating anthrodsoxycholic acid by using fresh swine bile as raw material, the invention further provides a process for preparing ursodeoxycholic acid by using fresh swine bile as raw material, which comprises extracting conjugated bile acid from swine bile after acidification, removing foreign materials such as aliphatic acid and protein and the like, preparing purified pig bile acid through hydrolysis (saponification) and hydroperoxide decolourization, extracting anthrodsoxycholic acid through solution immersion cleaning, preparing ursodeoxycholic acid through oxidization and reduction of anthrodsoxycholic acid which is obtained through separating. The process of the invention improves the preparation technology of ursodeoxycholic acid, and achieves positive effects on the aspects of technology simplification and output increase.