Objective to provide the evidence for inducing the SAP model in rats with proper concentration of sodium taurocholate. Methods 60 SD rats were divided into sham operated group, group of 1.5% in concentration, group of 3.5% in concentration and group of 5% in concentration randomly, while the SAP model was induced by the sodium taurocholate concentration of 1.5%, 3.5% and 5% with the method of retrograde injection into the biliopancreatic duct.To calculate the mortality of different groups, measure the serum amylase, tumor necrosis factor-α(TNF-α) and interleukin-6 (IL-6), and to observe the pancreatic pathological scores of HE staining in rats. Results The mortality in group of 5% in concentration has a significant ascending compared with group of 1.5% in concentration, while the serum amylase, tumor necrosis factor-α(TNF-α), interleukin-6(IL-6), pathological score of hemorrhage and acinar necrosis in group of 5% in concentration have a significant ascending compared with group of 1.5% in concentration and group of 3.5% in concentration. Conclusions A better SAP model may be induced by sodium taurocholate with the concentration of 5% by the method of retrograde injection into the biliopancreatic duct, which may accord with the physiological and pathological manifestation of SAP.